yii page title， CMenu 中文不显示

Page title: <?php echo CHtml::encode(iconv('gbk','utf-8',$this->pageTitle)); ?>

CMenu: framework/zii/widgets/CMenu.php, in function "normalizeItems", add this row: $item['label'] = iconv('gbk','utf-8',$item['label'])   in this block: foreach($items as $i=>$item){};