因为dedecms系统标签sql语句的原因,导航菜单标签不输出外部链接栏目,如果需要显示外部链接,5.7可以找include/taglib/channelartlist.lib.php第67行左右去掉红色代码:
$tpsql = ” reid=0 AND ispart<>2 AND ishidden<>1 AND channeltype>0 “;
改成:
$tpsql = ” reid=0 AND ishidden<>1 AND channeltype>0 “;
 
搞定!!