Copy this code and paste it in your HTML
{foreach from=$cats key=cid item=cna name=catne}
{if $smarty.foreach.catne.index % 4 == 0 || $smarty.foreach.catne.index==0}
{if $smarty.foreach.catne.index>1}
{/if}
{/if}
<li><a href="#">{$smarty.foreach.catne.index}
</a></li>
{/foreach}