您的导航菜单栏响应can用户bootstrap framework.

插入类似代码function.php

Bootstrap responcive nav menu wordpress

<div class="container"> 
  <nav class="navbar navbar-default" role="navigation">  
      <div class="navbar-header">
        <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#medi-temp-navbar-collapse"> 
                <span class="icon-bar"></span> 
                <span class="icon-bar"></span> 
                <span class="icon-bar"></span> 
        </button>
      </div>
      <div class="collapse navbar-collapse" id="medi-temp-navbar-collapse">    
        <?php
            if ( has_nav_menu( \'primary\' ) ) {
                wp_nav_menu( array( 
                    \'theme_location\' => \'primary\',
                      \'container\'=>false,
                      \'walker\'=>new wp_bootstrap_navwalker(),
                      \'menu_class\'=>\'nav navbar-nav\',
                    ) 
                );
            }
        ?>                      
    </div>
   </nav><!-- nav -->
</div><!-- container -->