1. 修改 /core/extend/ueditor/dialogs/link/link.html 第81行： 
    'href': href, 'target': $G("target").checked ? "_blank" : "_self", 'title': $G("title").value.replace(/^\s+|\s+$/g, ''), 'rel': 'nofollow', '_href': href
  2. 修改 /core/extend/ueditor/ueditor.config.js 第370行： 
    a: ['target', 'href', 'title', 'class', 'style', 'name', 'rel', 'id'],