我下载了一个模板，并试图将其转换为wordpress主题。如何在wordpress中添加菜单，而不是应用于它的松散样式？

我的标题中有此代码。php

<div
                class="collapse navbar-collapse main-menu-item justify-content-center"
                id="navbarSupportedContent"
              >
                <ul class="navbar-nav align-items-center">
                  <li class="nav-item">
                    <a class="nav-link" href="index.php">Home</a>
                  </li>
                  <li class="nav-item">
                    <a class="nav-link" href="about-us.php">About</a>
                  </li>
                  <li class="nav-item">
                    <a class="nav-link" href="services.html">services</a>
                  </li>
                  <li class="nav-item">
                    <a class="nav-link" href="blog.html">Blog</a>
                  </li>
                  <li class="nav-item dropdown">
                    <a
                      class="nav-link dropdown-toggle"
                      href="blog.html"
                      id="navbarDropdown"
                      role="button"
                      data-toggle="dropdown"
                      aria-haspopup="true"
                      aria-expanded="false"
                    >
                      Pages
                    </a>
                    <div class="dropdown-menu" aria-labelledby="navbarDropdown">
                      <a class="dropdown-item" href="project.html">project</a>
                      <a class="dropdown-item" href="single-blog.html"
                        >Single blog</a
                      >
                      <a class="dropdown-item" href="elements.html">Elements</a>
                    </div>
                  </li>
                  <li class="nav-item">
                    <a class="nav-link" href="contact.html">Contact</a>
                  </li>
                </ul>
              </div>

我试着用这个注册菜单

//add menu support
add_theme_support(\'menus\');

//register menu support
register_nav_menus(

    array(
        \'top-menu\' => __(\'Top Menu\',\'theme\'),
    )

)