Wordpress下拉菜单不工作＆amp;水平显示所有菜单

Question

    <ul class="social-menu">
      <!--<li><a href="<?php echo site_url(); ?>">Home</a></li>
      <li><a href="<?php echo site_url(); ?>/about/">About Us</a></li>
      <li><a href="<?php echo site_url(); ?>/portfolio/">Portfolio</a></li>
      <li><a href="<?php echo site_url(); ?>/available-lots-and-homes/">Available Lots and Homes</a></li>
      <li><a href="<?php echo site_url(); ?>/our-process/">Our Process</a></li>
      <li><a href="<?php echo site_url(); ?>/testimonials/">Testimonials</a></li>
      <li><a href="<?php echo site_url(); ?>/contact/">Contact</a></li>-->
      <li><a href="https://www.facebook.com/Copper-Creek-Homes-223569047732134/" target="_blank" class="social"><i class="fa fa-facebook"></i></span></a></li>
      <li><a href="https://www.houzz.com/pro/coppercreekhomesoh/copper-creek-homes" target="_blank" class="social"><img src="<?php echo get_template_directory_uri(); ?>/images/icon-houzz.png"></span></a></li>
      <li><a href="mailto:rks@coppercreekhomes.us" class="social"><i class="fa fa-envelope-o"></i></span></a></li>
    </ul>