这是我的html代码
<div class="section__main-nav" id="section__main-nav-id">
<div class="container">
<nav class="navbar navbar-toggleable-md navbar-light">
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#main-navbarToggler" aria-controls="main-navbarToggler" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="main-navbarToggler">
<ul class="nav navbar-nav">
<li class="nav-item active">
<a class="nav-link" href="index.html">Home<span class="sr-only">(current)</span></a>
</li>
<li class="nav-item dropdown">
<a href="shop.html" class="nav-link dropdown-toggle dropdown-hover" data-toggle="dropdown">Shop</a>
<div class="dropdown-menu">
<a class="dropdown-item" href="#">Hoddie</a>
<a class="dropdown-item" href="#">Long Sleeve Tees</a>
<a class="dropdown-item" href="#">Short Sleeve Tees</a>
<a class="dropdown-item" href="#">Tank Top</a>
<a class="dropdown-item" href="#">Jumper</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item color-primary" href="shop.html">See All</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link" href="about.html">About Us</a>
</li>
<li class="nav-item">
<a class="nav-link" href="contact.html">Contact Us</a>
</li>
</ul>
</div>
</nav>
</div>
</div>
我把它转换成我的wordpress<div class="section__main-nav" id="section__main-nav-id">
<div class="container">
<nav class="navbar navbar-toggleable-md navbar-light">
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#main-navbarToggler" aria-controls="main-navbarToggler" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<?php
wp_nav_menu( array(
\'theme_location\' => \'primary\',
\'container\' => \'div\',
\'container_class\' => \'collapse navbar-collapse\',
\'container_id\' => \'main-navbarToggler\',
\'menu_class\' => \'nav navbar-nav\'
) );
?>
</nav>
</div>
</div>
如何给出wordpress代码中下拉列表的类