Is there a lightbox function and how with Easyblog?

Hi,

Is it possible to have a lightbox function with Easyblog? At the moment we have an image that we would like to enlarge when you click on it?

I tried to add this html in an easyblog post, but the class: lightbox-close always gets deleted. Is there an other solution?
<a class="lightbox" href="#dog">
<img src="http://i.huffpost.com/gen/749263/original.jpg";/>
</a>
<div class="lightbox-target" id="dog">
<img src="http://i.huffpost.com/gen/749263/original.jpg";/>
<a class="lightbox-close" href="#"></a>
</div>