Update yii.php

framework/messages/zh-CN/yii.php

@@ -20,7 +20,7 @@ return array (
   'the input value' => '该输入',
   '(not set)' => '(未设置)',
   'An internal server error occurred.' => '服务器内部错误。',
-  'Are you sure to delete this item?' => '确定要删除这条数据吗？',
+  'Are you sure you want to delete this item?' => '您确定要删除此项吗？',
   'Delete' => '删除',
   'Error' => '错误',
   'File upload failed.' => '文件上传失败。',