link rel="stylesheet" type="text/css" href="css/materialdesignicons.min.css" />
    <link rel="stylesheet" type="text/css" href="css/responsive.css" />
    <link href="css/bootstrap.min.css" rel="stylesheet" type="text/css" />
    <link rel="stylesheet" type="text/css" href="css/plugins/animate.css" />
    <link rel="stylesheet" type="text/css" href="css/plugins/animated-headlines.css" />
    <link rel="stylesheet" type="text/css" href="css/plugins/jquery-ui.min.css" />
    <link rel="stylesheet" type="text/css" href="css/plugins/jquery.mb.YTPlayer.min.css" />
    <link rel="stylesheet" type="text/css" href="css/plugins/magnific-popup.css" />
    <link rel="stylesheet" type="text/css" href="css/plugins/meanmenu.min.css" />
    <link rel="stylesheet" type="text/css" href="css/plugins/nivo-slider.css" />
    <link rel="stylesheet" type="text/css" href="css/plugins/slick.css" />
 <style>
        .our-gallery .bg-img-2
        {
            background: url(images/gallery/bg-2.png)no-repeat scroll right bottom;
            padding-bottom: 50px;
            padding-top: 80px;
        }
        .col-md-offset-2
        {
            margin-left: 16.66666667%;
        }
        .our-gallery
        {
            position: relative;
            background: url(http://www.maurizioca.com/wp-content/uploads/2015/05/hummingbird-algorithm-inbound-marketing-seo.png)no-repeat scroll left top;
            background-color: #f1f1f1;
            background-size: 23%;
            background-position: -17px -15px;
            margin-left: 41px;
            margin-right: 41px;
        }
        .gallery-menu ul li
        {
            color: #535353;
            cursor: pointer;
            display: inline-block;
            font-weight: 600;
            margin-left: 35px;
            text-transform: uppercase;
        }
        default.css:122 li
        {
            list-style: none;
        }
        .gallery-menu ul li.active
        {
            color: #e54c2a;
        }
        .single-item-gallery:hover img
        {
            -webkit-transform: scale(1.1);
            transform: scale(1.1);
        }
        style.css:557 .single-item-gallery > img
        {
            -webkit-transition: all 0.5s ease 0s;
            transition: all 0.5s ease 0s;
        }
        .single-item-gallery a
        {
            background: #fff none repeat scroll 0 0;
            border-radius: 50%;
            color: #e54c2a;
            font-size: 22px;
            height: 40px;
            left: 0;
            line-height: 40px;
            margin: -20px auto 0;
            opacity: 0;
            -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";
            position: absolute;
            right: 0;
            text-align: center;
            top: 50%;
            -webkit-transform: scale(0.2);
            transform: scale(0.2);
            -webkit-transition: all 400ms cubic-bezier(1, -0.6, 0.57, -0.15) 0s;
            transition: all 400ms cubic-bezier(1, -0.6, 0.57, -0.15) 0s;
            width: 40px;
            z-index: 999;
        }
        .mdi
        {
            display: inline-block;
            font: normal normal normal 24px/1 "Material Design Icons";
            font-size: inherit;
            text-rendering: auto;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            transform: translate(0, 0);
        }
        .mfp-container
        {
            text-align: center;
            position: absolute;
            width: 100%;
            height: 100%;
            left: 0;
            top: 0;
            padding: 0 8px;
            box-sizing: border-box;
        }
    </style>
 
   <div class="our-gallery">
        <div class="bg-img-2">
            <div class="container">
                <div class="row">
                    <div class="col-md-8 col-md-offset-2">
                        <div class="section-title grey_bg mb-50 text-center">
                            <h2 class="mb-50">
                                our gallery</h2>
                            <p>
                                Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor
                                incididunt ut labore et dolore magna aliqua. Ut enim ad minim nostrud exercitation
                                ullamco laboris nisi.</p>
                        </div>
                    </div>
                    <div class="row">
                        <div class="col-md-12">
                            <div class="gallery-menu fix text-center mb-60">
                                <ul>
                                    <li class="active" data-filter="*">all</li>
                                    <li data-filter=".babylon">babylon</li>
                                    <li data-filter=".nasa">nasa</li>
                                    <li data-filter=".malgudi">malgudi days</li>
                                    <li data-filter=".sweets">sweets & namkin</li>
                                    <li data-filter=".hotel">hotel</li>
                                </ul>
                            </div>
                            <div class="gallery-item-box row" style="position: relative; height: 1548px;">
                                <div class="col-md-4 col-sm-6 col-xs-12 gallery-item babylon mb-30" style="position: absolute;
                                    left: 0px; top: 0px;">
                                    <div class="single-item-gallery">
                                        <a href="images/gallery/1.jpg"><span class="plus"><i class="mdi mdi-plus"></i></span>
                                        </a>
                                        <img src="images/gallery/1.jpg" alt="">
                                    </div>
                                </div>
                                <div class="col-md-4 col-sm-6 col-xs-12 gallery-item babylon mb-30" style="position: absolute;
                                    left: 390px; top: 0px;">
                                    <div class="single-item-gallery">
                                        <a href="images/gallery/2.jpg"><span class="plus"><i class="mdi mdi-plus"></i></span>
                                        </a>
                                        <img src="images/gallery/2.jpg" alt="">
                                    </div>
                                </div>
                                <div class="col-md-4 col-sm-6 col-xs-12 gallery-item babylon mb-30" style="position: absolute;
                                    left: 780px; top: 0px;">
                                    <div class="single-item-gallery">
                                        <a href="images/gallery/3.jpg"><span class="plus"><i class="mdi mdi-plus"></i></span>
                                        </a>
                                        <img src="images/gallery/3.jpg" alt="">
                                    </div>
                                </div>
                                <div class="col-md-4 col-sm-6 col-xs-12 gallery-item nasa mb-30" style="position: absolute;
                                    left: 0px; top: 258px;">
                                    <div class="single-item-gallery">
                                        <a href="images/gallery/4.jpg"><span class="plus"><i class="mdi mdi-plus"></i></span>
                                        </a>
                                        <img src="images/gallery/4.jpg" alt="">
                                    </div>
                                </div>
                                <div class="col-md-4 col-sm-6 col-xs-12 gallery-item nasa mb-30" style="position: absolute;
                                    left: 390px; top: 258px;">
                                    <div class="single-item-gallery">
                                        <a href="images/gallery/5.jpg"><span class="plus"><i class="mdi mdi-plus"></i></span>
                                        </a>
                                        <img src="images/gallery/5.jpg" alt="">
                                    </div>
                                </div>
                                <div class="col-md-4 col-sm-6 col-xs-12 gallery-item nasa mb-30" style="position: absolute;
                                    left: 780px; top: 258px;">
                                    <div class="single-item-gallery">
                                        <a href="images/gallery/6.jpg"><span class="plus"><i class="mdi mdi-plus"></i></span>
                                        </a>
                                        <img src="images/gallery/6.jpg" alt="">
                                    </div>
                                </div>
                                <div class="col-md-4 col-sm-6 col-xs-12 gallery-item malgudi mb-30" style="position: absolute;
                                    left: 0px; top: 516px;">
                                    <div class="single-item-gallery">
                                        <a href="images/gallery/7.jpg"><span class="plus"><i class="mdi mdi-plus"></i></span>
                                        </a>
                                        <img src="images/gallery/7.jpg" alt="">
                                    </div>
                                </div>
                                <div class="col-md-4 col-sm-6 col-xs-12 gallery-item malgudi mb-30" style="position: absolute;
                                    left: 390px; top: 516px;">
                                    <div class="single-item-gallery">
                                        <a href="images/gallery/8.jpg"><span class="plus"><i class="mdi mdi-plus"></i></span>
                                        </a>
                                        <img src="images/gallery/8.jpg" alt="">
                                    </div>
                                </div>
                                <div class="col-md-4 col-sm-6 col-xs-12 gallery-item malgudi mb-30" style="position: absolute;
                                    left: 780px; top: 516px;">
                                    <div class="single-item-gallery">
                                        <a href="images/gallery/9.jpg"><span class="plus"><i class="mdi mdi-plus"></i></span>
                                        </a>
                                        <img src="images/gallery/9.jpg" alt="">
                                    </div>
                                </div>
                                <div class="col-md-4 col-sm-6 col-xs-12 gallery-item sweets mb-30" style="position: absolute;
                                    left: 0px; top: 774px;">
                                    <div class="single-item-gallery">
                                        <a href="images/gallery/10.jpg"><span class="plus"><i class="mdi mdi-plus"></i></span>
                                        </a>
                                        <img src="images/gallery/10.jpg" alt="">
                                    </div>
                                </div>
                                <div class="col-md-4 col-sm-6 col-xs-12 gallery-item sweets mb-30" style="position: absolute;
                                    left: 390px; top: 774px;">
                                    <div class="single-item-gallery">
                                        <a href="images/gallery/11.jpg"><span class="plus"><i class="mdi mdi-plus"></i></span>
                                        </a>
                                        <img src="images/gallery/11.jpg" alt="">
                                    </div>
                                </div>
                                <div class="col-md-4 col-sm-6 col-xs-12 gallery-item sweets mb-30" style="position: absolute;
                                    left: 780px; top: 774px;">
                                    <div class="single-item-gallery">
                                        <a href="images/gallery/12.jpg"><span class="plus"><i class="mdi mdi-plus"></i></span>
                                        </a>
                                        <img src="images/gallery/12.jpg" alt="">
                                    </div>
                                </div>
                                <div class="col-md-4 col-sm-6 col-xs-12 gallery-item sweets mb-30" style="position: absolute;
                                    left: 0px; top: 1032px;">
                                    <div class="single-item-gallery">
                                        <a href="images/gallery/13.jpg"><span class="plus"><i class="mdi mdi-plus"></i></span>
                                        </a>
                                        <img src="images/gallery/13.jpg" alt="">
                                    </div>
                                </div>
                                <div class="col-md-4 col-sm-6 col-xs-12 gallery-item hotel mb-30" style="position: absolute;
                                    left: 390px; top: 1032px;">
                                    <div class="single-item-gallery">
                                        <a href="images/gallery/14.jpg"><span class="plus"><i class="mdi mdi-plus"></i></span>
                                        </a>
                                        <img src="images/gallery/14.jpg" alt="">
                                    </div>
                                </div>
                                <div class="col-md-4 col-sm-6 col-xs-12 gallery-item hotel mb-30" style="position: absolute;
                                    left: 780px; top: 1032px;">
                                    <div class="single-item-gallery">
                                        <a href="images/gallery/15.jpg"><span class="plus"><i class="mdi mdi-plus"></i></span>
                                        </a>
                                        <img src="images/gallery/15.jpg" alt="">
                                    </div>
                                </div>
                                <div class="col-md-4 col-sm-6 col-xs-12 gallery-item hotel mb-30" style="position: absolute;
                                    left: 0px; top: 1290px;">
                                    <div class="single-item-gallery">
                                        <a href="images/gallery/16.jpg"><span class="plus"><i class="mdi mdi-plus"></i></span>
                                        </a>
                                        <img src="images/gallery/16.jpg" alt="">
                                    </div>
                                </div>
                                <div class="col-md-4 col-sm-6 col-xs-12 gallery-item hotel mb-30" style="position: absolute;
                                    left: 390px; top: 1290px;">
                                    <div class="single-item-gallery">
                                        <a href="images/gallery/17.jpg"><span class="plus"><i class="mdi mdi-plus"></i></span>
                                        </a>
                                        <img src="images/gallery/17.jpg" alt="">
                                    </div>
                                </div>
                                <div class="col-md-4 col-sm-6 col-xs-12 gallery-item hotel mb-30" style="position: absolute;
                                    left: 780px; top: 1290px;">
                                    <div class="single-item-gallery">
                                        <a href="images/gallery/18.jpg"><span class="plus"><i class="mdi mdi-plus"></i></span>
                                        </a>
                                        <img src="images/gallery/18.jpg" alt="">
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
i want to display like 
when i do mouse hover image color should change to oranage
and it should display + sing on mouse hover when i clicck on it it should open image