public function getAlphaFilter($selected=NULL) {
		
		$router = Router::getInstance();
		
		foreach (range('A', 'Z') as $a) {
			
			$filter = new \stdClass();
			$filter->href	= $router->module . '/' . $router->action . '/' . strtolower($a) . '/page-1';
			$filter->text	= $a;
			$filter->active	= ($a == $selected);
			
			yield $filter;
			
		}
		
	}