As Cherie says...
Code:
{foreach from=$categories_menu_list item=c name=categories}
<li{interline name=categories}><a href="home.php?cat={$c.categoryid}" title="{$c.category|escape}"{if $current_category.categoryid eq $cat} style="font-style: bold;"{/if}>{$c.category|amp}</a></li>
{/foreach}