PakoGonsalezZ,
if ($Shop_Controller_Show->group)
{
$group_id = 123;
$Shop_Group = Core_Entity::factory('Shop_Group', $Shop_Controller_Show->group);
do {
$aGroups[] = $Shop_Group->id;
} while($Shop_Group = $Shop_Group->getParent());
if (in_array($group_id, $aGroups))
{
$xslName = $Shop_Controller_Show->item
? 'ДругойШаблонТовара'
: 'ДругойШаблонГруппы';
}
}