public static function helper($helperName, $args = array(), $dirs = null)
    {
        self::loadHelper($helperName, $dirs);
        return call_user_func_array(self::$loadedHelpers[$helperName], $args);
    }
public static function helper($helperName, $args = array(), $dirs = null)
    {
        self::loadHelper($helperName, $dirs);
        return call_user_func_array(self::$loadedHelpers[$helperName], $args);
    }
public static function helper ( $ helperName , $ args = array ( ) , $ dirs = null ) { self :: loadHelper ( $ helperName , $ dirs ) ; return call_user_func_array ( self :: $ loadedHelpers [ $ helperName ] , $ args ) ; }
Executes an helper

@param string $helperName
@param array $args Arguments for the helper
@param array $dirs Directories where to search for helpers
@return mixed
Executes an helper