Hi,
Yes you're right MallRomania, I foget to add variable in skin1/customer/categorie.tpl
Add this line were you need to show the subategorie
{assign var=in value=$c.categoryid}
{foreach from=$allsubcategories.$in item=c }
and then the link of your subcategorie (you modify it to fit your template)
<a href="home.php?cat={$c.categoryid}" class="CategoriesList3">{$c.category}<br></a>