修改次外层ul的class和id:
<?php
wp_nav_menu(array(
'theme_location'=>'primary',
'container'=>'',//空,可以不显示最外层
'menu_class'=>'menuclass', //ul节点class值
'menu_id'=>'menuid', //ul节点id值
'depth'=>'0'
));
?>
对应HTML
<ul id="menuid" class="menuclass">
<li id="menu-item-7" class="menu-item menu-item-type-custom menu-item-object-custom current-menu-item current_page_item menu-item-home menu-item-7"><a href="http://127.0.0.1/startbootstrap/" aria-current="page">首页</a></li>
<li id="menu-item-8" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-8"><a href="http://127.0.0.1/startbootstrap/sample-page/">示例页面</a>
<ul class="sub-menu">
<li id="menu-item-23" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-23"><a href="http://127.0.0.1/startbootstrap/test-page/">测试页面</a></li>
</ul>
</li>
<li id="menu-item-21" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-21"><a href="http://127.0.0.1/startbootstrap/category/uncategorized/">未分类</a></li>
</ul>