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请问导航点击跳转后选中状态怎么处理子栏目如何判断技能竞赛全国
请问导航点击跳转后，选中状态怎么处理？子栏目如何判断
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" data-toggle="dropdown">
技能竞赛
</a>
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<a class="dropdown-item" href="zyds_index.html">全国职业院校</a>
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<!--第一层：调用pid=0表示顶级--> {category module=share pid=0} <li class="nav-item dropdown {if IS_SHARE && $catid && in_array($catid, $t.catids)} active{/if}"> <a class="nav-link {if !empty($t.pids)} dropdown-toggle{/if}" href=" " {if $t.tid==2} target="_blank"{/if} id="navbarDropdown"> {$t.name} </ a> {if $t.child} <div class="dropdown-menu mt-0"> <!--第二层：调用第二级共享栏目--> {category module=share pid=$t.id return=t2} <a class="dropdown-item {if IS_SHARE && $catid && in_array($catid, $t2.catids)} active{/if}" href="{$t2.url}"><span class="iconfont">{html_entity_decode($t2.tubiao)}</span>{$t2.name}</ a> {/category} </div> {/if} </li> {/category}