lib/modules/Forums/styles/category-cloud.tpl
<script id="category-cloud" type="text/html">
<section title="{-"Categories"|translate}" style="min-height: 500px;">
<h3><i class="fa fa-cloud fa-fw"></i> {-"Categories"|translate}</h3>
<div class="category-cloud">{%#o.cloud%}</div>
</section>
</script>
<script id="category-cloud-item" type="text/html">
<a class="label label-primary category-cloud-item"
href="{%=convertUrl({'module':'forums','action':'category','x':o.tag})%}">{%=o.name%} ({%=o.threadCount%}
)</a>
</script>