galleria.js

image list should look like this
<ol>
  <li><img src="foo.jpg" descr="http://example.com"/></li>
</ol>

92: change 'span' to 'a'

127: // find caption link
     var _cap_linksrc = _a ? _a.attr('descr') : _img.attr('descr');_img.attr('descr');

     308: _wrapper.siblings('.caption').attr('href','_cap_linksrc');