Mene na stronie

Mam sobie takie menu w wordpressie

<div id="navbar" class="navbar-collapse collapse navbar-right">
                <ul class="nav navbar-nav">
                  <li class="hidden active">
                      <a href="#page-top"></a>
                  </li>
                  <li class=""><a class="page-scroll" href="#about">About Us</a></li>
                  <li class=""><a class="page-scroll" href="#offer">Services</a></li>
                  <li class=""><a class="page-scroll" href="#portfolio">Portfolio</a></li>
                  <li class=""><a class="page-scroll" href="#team">Team</a></li>
                  <li class=""><a class="page-scroll" href="#contact">Contact</a></li>
                </ul>
              </div>

i próbuje go zapisać w taki o to sposób ale coś źle

<?php
                    wp_nav_menu( array(
                        'menu'              => 'header-menu',
                        'theme_location'    => 'header-menu',
                        'menu_class'        => 'nav navbar-nav',
                        'link_before'       => '<li class="hidden active"><a href="#page-top"></a></li>')
                    );
                ?>