title: Add a Second Level menu class to wordpress Nav Menu
body: <p>I used this code to create a new submenu class, but now I want to create a different class for the second level submenu.  submenu--2 is this possible?</p>
  <pre><code>  add_filter( 'nav_menu_link_attributes', 'add_menu_link_class', 1, 3 );
  
    class Child_Wrap extends Walker_Nav_Menu
  {
      function start_lvl(&amp;$output, $depth = 0, $args = array())
      {
          $indent = str_repeat(&quot;\t&quot;, $depth);
          $output .= &quot;$indent&lt;ul class=\&quot;navigation__item--submenu\&quot; &gt;\n&quot;;
      }
  
      function end_lvl(&amp;$output, $depth = 0, $args = array())
      {
          $indent = str_repeat(&quot;\t&quot;, $depth);
          $output .= &quot;$indent&lt;/ul&gt;&quot;;
      }
      
  }
  </code></pre>