/* 入库的操作 */
  if ($db->autoExecute($ecs->table('category'), $cat) !== false)
  {
   $cat_id = $db->insert_id();
   if($cat['show_in_nav'] == 1)
   {
    $vieworder = $db->getOne("SELECT max(vieworder) FROM ". $ecs->table('nav') . " WHERE type = 'middle'");
    $vieworder += 2;
    //显示在自定义导航栏中
    $sql = "INSERT INTO " . $ecs->table('nav') .
     " (name,ctype,cid,ifshow,vieworder,opennew,url,type)".
     " VALUES('" . $cat['cat_name'] . "', 'c', '".$db->insert_id()."','1','$vieworder','0', '" . build_uri('category', array('cid'=> $cat_id), $cat['cat_name']) . "','middle')";
    $db->query($sql);
   }
   insert_cat_recommend($cat['cat_recommend'], $cat_id);
  }
 }
 
 admin_log($_POST['cat_name'], 'add', 'category');   // 记录管理员操作
 clear_cache_files();    // 清除缓存

 /*添加链接*/
 $link[0]['text'] = $_LANG['continue_add'];
 $link[0]['href'] = 'category.php?act=add';

 $link[1]['text'] = $_LANG['back_list'];
 $link[1]['href'] = 'category.php?act=list';

 sys_msg($_LANG['catadd_succed'], 0, $link);

}

三、编辑/languages/zh_cn/admin/category.php，添加

$_LANG['notice_cat_name'] = '如果您需要添加多个分类，请在分类之间使用半角逗号分隔。';