I forget this line too
in skin1/customer/categories.tpl
Where you need to show the subcategorie
{assign var=in value=$c.categoryid}
{foreach from=$allsubcategories.$in item=c }
and the link to show subcategories
<a href="home.php?cat={$c.categoryid}" class="yourclassforsub">{$c.category}<br></a>
thank you I was forogotten it in my previous post
Thank you