[cakephp][1.2.x.x]URLで言語を切り替える方法

$bits = explode('/', $_GET['url']);
foreach($bits as $strUrl){
    if($strUrl === 'ja' || $strUrl === 'en'){
        Configure::write('Config.language', $strUrl);
	Router::connect("/$strUrl/admin/:controller/:action/*", 
                array(
                    'controller' => ':controller',
                    'prefix' => 'admin',

                    'action' => ':action'
                )
                );

        break;
    }
}