I’m utilizing this Bootstrap 4 Navwalker, bs4navwalker, to step by way of my WordPress menu objects and generate a navbar, like…

Single stage – works

    <?php
    wp_nav_menu([
      'menu'            => 'primary',
      'theme_location'  => 'primary',
      'container'       => 'nav',
      'container_class' => 'sidebar-nav',
      'menu_id'         => 'sidebarnav',
      'depth'           => 2,
      'fallback_cb'     => 'bs4navwalker::fallback',
      'walker'          => new bs4navwalker()
    ]);
    ?>

This appropriately generates a navbar like …

<nav class="sidebar-nav">
    <ul id="sidebarnav" class="menu">
        <li id="menu-item-3" class="menu-item menu-item-type-custom menu-item-object-custom current-menu-item current_page_item menu-item-home menu-item-3 nav-item energetic">
            <a title="House Web page" goal="_blank" href="http://sandbox.contexthq.com/" class="nav-link energetic" aria-expanded="false">
                <i class="icon-speedometer"></i>House Web page
            </a>
        </li>
        <li id="menu-item-4" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-4 nav-item">
            <a title="Instance Web page" goal="_blank" href="http://instance.com/" class="nav-link" aria-expanded="false">
                <i class="ti-layout-grid2"></i>Instance Web page
            </a>
        </li>
        <li id="menu-item-5" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-5 nav-item">
            <a title="Customized Web page" goal="_blank" href="http://instance.com/{custom}/" class="nav-link" aria-expanded="false">
                <i class="ti-palette"></i>Customized Web page
            </a>
        </li>
    </ul>
</nav>

Multi-level – most well-liked

The issue occurs in terms of drop-down/sub-menu objects…

My theme handles these like this…

<nav class="sidebar-nav">
  <ul id="sidebarnav">
      <li class="chosen">
            <a category="has-arrow waves-effect waves-dark" href="javascript:void(0)" aria-expanded="false">
                <i class="icon-speedometer"></i>
                <span class="hide-menu">
                    Dashboard <span class="badge badge-pill badge-cyan">4</span>
                </span>
            </a>
            <ul aria-expanded="false" class="collapse">
              <li><a href="index.html">Minimal</a></li>
              <li><a href="index2.html">Analytical</a></li>
              <li><a href="index3.html">Demographical</a></li>
              <li class="energetic"><a href="index4.html" class="energetic">Fashionable</a></li>
              <li><a href="index5.html">Cryptocurrency</a></li>
          </ul>
      </li>
      <li>
          <a category="has-arrow waves-effect waves-dark" href="javascript:void(0)" aria-expanded="false">
                <i class="ti-layout-grid2"></i>
                <span class="hide-menu">Apps</span>
          </a>
          <ul aria-expanded="false" class="collapse">
              <li><a href="app-calendar.html">Calendar</a></li>
              <li><a href="app-chat.html">Chat app</a></li>
              <li><a href="app-ticket.html">Help Ticket</a></li>
              <li><a href="app-contact.html">Contact / Worker</a></li>
              <li><a href="app-contact2.html">Contact Grid</a></li>
              <li><a href="app-contact-detail.html">Contact Element</a></li>
              <li><a href="javascript:void(0)" class="has-arrow">Inbox</a>
                  <ul aria-expanded="false" class="collapse">
                      <li><a href="app-email.html">Mailbox</a></li>
                      <li><a href="app-email-detail.html">Mailbox Element</a></li>
                      <li><a href="app-compose.html">Compose Mail</a></li>
                  </ul>
              </li>
          </ul>
      </li>
    </nav>

… That’s, it:

• provides a <span> with .hide-menu contained in the top-level hyperlink <a>
• provides an <ul> unordered listing afterward.

That is the strategy I wish to persist with.

Multi-level: what navwalker provides

Nevertheless, when utilizing the navwalker, I get…

<nav class="sidebar-nav">
    <ul id="sidebarnav" class="menu">
        <li id="menu-item-3" class="menu-item menu-item-type-custom menu-item-object-custom current-menu-item current_page_item menu-item-home menu-item-has-children menu-item-3 nav-item dropdown energetic">
            <a title="House Web page" goal="_blank" href="http://sandbox.contexthq.com/" class="nav-link dropdown-toggle energetic" data-toggle="dropdown" aria-expanded="false">
                <i class="icon-speedometer"></i>House Web page</a>
                <div class="dropdown-menu">
                    <a href="http://sandbox.contexthq.com/sample-page/" class="dropdown-item" aria-expanded="false"><i class="ti-palette"></i>Pattern Web page</a>
                </div>
        </li>
        ...
    </ul>
</nav>

That’s, it…

• locations a <div> with .dropdown-menu contained in the <a>, as a substitute of a <span> with .hide-menu
• for the sub-menu objects, makes use of <a> components

I am positive that is customary Bootstrap 4 behaviour – actually, I’ve fortunately used it this fashion on a distinct web site. Nevertheless, it is not what is required by the Bootstrap 4 theme which I’ve bought and am at present attempting to show in to a WordPress theme…

The query

How can I exploit the bs4navwalker however in a manner that may current drop-down/sub-menu objects in a way per my theme… ?