function onMembershipExpire($row) {
	if ($row->user_id) {
		$user = JFactory::getUser($row->user_id);
		$currentGroups  = $user->get('groups') ;
		$plan = JTable::getInstance('Osmembership','Plan');
		$plan->load($row->plan_id);
		$params = new JRegistry($plan->params);
		$groups = explode(',', $params->get('joomla_expried_group_ids'));
		$activePlans = OSMembershipHelper::getActiveMembershipPlans($row->user_id);
		for ($i = 0 , $n = count($activePlans); $i < $n; $i++)
		{
			if ($activePlans[$i] == $row->plan_id)
			{
				unset($activePlans[$i]);
				break;
			}
		}
		$db = JFactory::getDbo();
		$query = $db->getQuery(true);
		$query->select('params')
		->from('#__osmembership_plans')
		->where('id IN  ('.implode(',', $activePlans).')');
		$db->setQuery($query);
		$rowPlans = $db->loadObjectList();
		if (count($rowPlans))
		{
			foreach ($rowPlans as $rowPlan)
			{
				$planParams = new JRegistry($rowPlan->params);
				$planGroups = explode(',', $planParams->get('joomla_group_ids'));
				$groups = array_diff($groups, $planGroups);
			}
		}
		$currentGroups = array_unique(array_diff($currentGroups, $groups)) ;
		//In case he doesn't belong to any group, assign him to new group
		if (count($currentGroups) == 0)
		{
			//Assign him to default Joomla group
			$params = JComponentHelper::getParams('com_users');
			
			$currentGroups[] = $params->get('new_usertype', 2);
		}
		$user->set('groups', $currentGroups);
		$user->save(true);			
	}		
}