$user = JFactory::getUser(); // get usergroup
$groups = $user->get("groups");
foreach($groups as $group)
{
if ($group=="10") //
{
echo '<script type="text/javascript">
jQuery(document).ready(function(){
jQuery(".cat-list-row0:nth-of-type(6)").css("display", "none");
});
</script>';
}

if ($group=="11")
{
echo '<script type="text/javascript">
jQuery(document).ready(function(){
jQuery(".cat-list-row0:nth-of-type(17)").css("display", "none");
});
</script>';
}
}