Catalog::updateAction

public function updateAction($id, array $fields)
{
	$r = $this->exists($id);
	if($r->isSuccess())
	{
		$r = $this->updateValidate($fields+['ID'=>$id]);
		if($r->isSuccess())
		{
			CCatalog::update($id, $fields);
		}
	}

	if($r->isSuccess())
	{
		return ['CATALOG'=>$this->get($id)];
	}
	else
	{
		$this->addErrors($r->getErrors());
		return null;
	}
}