Bootstrap Lighbox - how to add caption with link? - twitter-bootstrap-3

Question

I would like some of my Lightbox gallery images to have a caption with a link to another website. And if the caption link can open up in a new window/tab like the target="_blank" style. But I have no idea how to do this. Could I have some help please? Thanks in advance :)
Code for one gallery image:
<li class="col-xs-6 col-sm-6 col-md-3 col-lg-3 bottom-space">
<a href="img/photos/gallery/gallery_photo044.jpg" data-lightbox="tristone" data-title="My caption goes here">
<img class="img-responsive" src="img/photos/gallery-thumbs/gallery-thumbs044.jpg">
</a>
</li>
I have read somewhere I could use data attributes, so I tried data-href:
<li class="col-xs-6 col-sm-6 col-md-3 col-lg-3 bottom-space">
<a href="img/photos/gallery/gallery_photo044.jpg" data-lightbox="tristone" data-title="My caption goes here" data-href="http://mylinkgoeshere">
<img class="img-responsive" src="img/photos/gallery-thumbs/gallery-thumbs044.jpg">
</a>
</li>
But of course that didn't work since I don't really know what data-href does so I was just guessing :( I did look up about it but I guess my coding level isn't good enough so I don't understand it ^^;
Lightbox.css:
/* Preload images */
body:after {
content: url(../img/close.png) url(../img/loading.gif) url(../img/prev.png) url(../img/next.png);
display: none;
}
.lightboxOverlay {
position: absolute;
top: 0;
left: 0;
z-index: 9999;
background-color: black;
filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=80);
opacity: 0.8;
display: none;
}
.lightbox {
position: absolute;
left: 0;
width: 100%;
z-index: 10000;
text-align: center;
line-height: 0;
font-weight: normal;
}
.lightbox .lb-image {
display: block;
height: auto;
max-width: inherit;
-webkit-border-radius: 3px;
-moz-border-radius: 3px;
-ms-border-radius: 3px;
-o-border-radius: 3px;
border-radius: 3px;
}
.lightbox a img {
border: none;
}
.lb-outerContainer {
position: relative;
background-color: white;
*zoom: 1;
width: 250px;
height: 250px;
margin: 0 auto;
-webkit-border-radius: 4px;
-moz-border-radius: 4px;
-ms-border-radius: 4px;
-o-border-radius: 4px;
border-radius: 4px;
}
.lb-outerContainer:after {
content: "";
display: table;
clear: both;
}
.lb-container {
padding: 4px;
}
.lb-loader {
position: absolute;
top: 43%;
left: 0;
height: 25%;
width: 100%;
text-align: center;
line-height: 0;
}
.lb-cancel {
display: block;
width: 32px;
height: 32px;
margin: 0 auto;
background: url(../img/loading.gif) no-repeat;
}
.lb-nav {
position: absolute;
top: 0;
left: 0;
height: 100%;
width: 100%;
z-index: 10;
}
.lb-container > .nav {
left: 0;
}
.lb-nav a {
outline: none;
background-image: url('data:image/gif;base64,R0lGODlhAQABAPAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==');
}
.lb-prev, .lb-next {
height: 100%;
cursor: pointer;
display: block;
}
.lb-nav a.lb-prev {
width: 34%;
left: 0;
float: left;
background: url(../img/prev.png) left 48% no-repeat;
filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=0);
opacity: 0;
-webkit-transition: opacity 0.6s;
-moz-transition: opacity 0.6s;
-o-transition: opacity 0.6s;
transition: opacity 0.6s;
}
.lb-nav a.lb-prev:hover {
filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=100);
opacity: 1;
}
.lb-nav a.lb-next {
width: 64%;
right: 0;
float: right;
background: url(../img/next.png) right 48% no-repeat;
filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=0);
opacity: 0;
-webkit-transition: opacity 0.6s;
-moz-transition: opacity 0.6s;
-o-transition: opacity 0.6s;
transition: opacity 0.6s;
}
.lb-nav a.lb-next:hover {
filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=100);
opacity: 1;
}
.lb-dataContainer {
margin: 0 auto;
padding-top: 5px;
*zoom: 1;
width: 100%;
-moz-border-radius-bottomleft: 4px;
-webkit-border-bottom-left-radius: 4px;
border-bottom-left-radius: 4px;
-moz-border-radius-bottomright: 4px;
-webkit-border-bottom-right-radius: 4px;
border-bottom-right-radius: 4px;
}
.lb-dataContainer:after {
content: "";
display: table;
clear: both;
}
.lb-data {
padding: 0 4px;
color: #ccc;
}
.lb-data .lb-details {
width: 85%;
float: left;
text-align: left;
line-height: 1.1em;
}
.lb-data .lb-caption {
font-size: 13px;
font-weight: bold;
line-height: 1em;
}
.lb-data .lb-number {
display: block;
clear: left;
padding-bottom: 1em;
font-size: 12px;
color: #999999;
}
.lb-data .lb-close {
display: block;
float: right;
width: 30px;
height: 30px;
background: url(../img/close.png) top right no-repeat;
text-align: right;
outline: none;
filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=70);
opacity: 0.7;
-webkit-transition: opacity 0.2s;
-moz-transition: opacity 0.2s;
-o-transition: opacity 0.2s;
transition: opacity 0.2s;
}
.lb-data .lb-close:hover {
cursor: pointer;
filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=100);
opacity: 1;
}