public static function init() { self::$icon['href'] = Yii::app()->theme->baseUrl . "/images/house.png"; self::$icon['size'] = array('x' => 32, 'y' => 37); self::$icon['offset'] = array('x' => -16, 'y' => -35); if (!isset(self::$_instance)) { $className = __CLASS__; self::$_instance = new $className(); } return self::$_instance; }