movim/app/widgets/Post/_post_gallery.tpl

<ul class="thin">
    <li>
        <span class="icon bubble" style="background-image: url({$embed->images|key|htmlspecialchars});">
            <i class="md md-image"></i>
        </span>
        <span>{$c->__('post.gallery')}</span>
    </li>
</ul>