Hi, Can anyone tell me how to use dynamic variables in smarty foreach loop. I am trying to create a module in prestashop and m very close to get it done. here's my code:

//file name index.php
foreach($subCategories as $s)
{
    $foo = intval($s['id_category']);
    $k = new Category($foo);

$var1 = "subSubCategories.$foo"; $var1 = $k->getSubCategories(1); $smarty->assign(array('foo'.$foo => $var1)); }

//file name:index.tpl

{assign var=foo value=$foo$cat}
//where $cat is a variable that counts the number of categories
{if isset($foo) AND $foo}
{foreach from=$foo item=subCategories name=homesubCategories}
<p>{$subCategories.name}</p>
{/foreach}
{else}
    <p>{l s='test failed'}</p>
{/if}

I've exhausted all of my resources and knowledge and feeling quite helpless at this moment. so plz help me out.