dz里的导航怎么写的啊

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我要做成这样的导航
我不知道这个首页和url怎么出来的

我用默认的无法达到啊。能不能教我一下，谢谢

<!--{loop $_G['setting']['navs'] $nav}-->
               
                <!--{if $nav['available'] && (!$nav['level'] || ($nav['level'] == 1 && $_G['uid']) || ($nav['level'] == 2 && $_G['adminid'] > 0) || ($nav['level'] == 3 && $_G['adminid'] == 1))}--><li {if $mnid == $nav[navid]}class="a" {/if}$nav[nav]></li>  <a class="navList {if $mnid == $nav[navid]}class="current" {/if} " href="/"  >$nav[nav]</a><span class="navLine"></span><!--{/if}-->
                <!--{/loop}-->