Bunun yerine, istediğiniz html kodunu header.php dosyasındaki mevcut kodlarla birlikte kullanabilirsiniz

<?php get_menu_html(array('slug' => 'home', 'parent_icon' =>'&nbsp;<i class="bx bx-caret-down"></i>', 'class' => 'navbar-nav m-auto' , 'sub_ul_class' => 'dropdown-menu-item')); ?>

<ul class="navbar-nav m-auto">
  <li class="nav-item">
    <a href="#" class="nav-link active">
      Anasayfa 
    </a>
  </li>

  <li class="nav-item">
    <a href="#" class="nav-link">
      Kurumsal 
      <i class='bx bx-caret-down'></i>
    </a>

    <ul class="dropdown-menu">
      <li class="nav-item">
        <a href="courses-1.html" class="nav-link">Hakkımızda</a>
      </li>

      <li class="nav-item">
        <a href="courses-2.html" class="nav-link">Misyon</a>
      </li>

      <li class="nav-item">
        <a href="membership-levels.html" class="nav-link">Vizyon</a>
      </li>
    </ul>
  </li>

  <li class="nav-item">
    <a href="#" class="nav-link">
      Services 
      <i class='bx bx-caret-down'></i>
    </a>

    <ul class="dropdown-menu">
      <li class="nav-item">
        <a href="services.html" class="nav-link">Services</a>
      </li>

      <li class="nav-item">
        <a href="services-details.html" class="nav-link">Services Details</a>
      </li>
    </ul>
  </li>

  <li class="nav-item">
    <a href="contact.html" class="nav-link">Contact</a>
  </li>
</ul>