<nav class="navbar navbar-default" role="navigation">
                          <!-- Brand and toggle get grouped for better mobile display -->
                          <div class="navbar-header">
                            <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
                              <span class="sr-only">Toggle navigation</span>
                              <span class="icon-bar"></span>
                              <span class="icon-bar"></span>
                              <span class="icon-bar"></span>
                            </button>
                          </div>
                          <!-- Collect the nav links, forms, and other content for toggling -->
							<div class="collapse navbar-collapse navbar-ex1-collapse">
								<?php
                                wp_nav_menu( array(
                                    'theme_location' => 'header-menu',
                                    'depth' => 2,
                                    'container' => false,
                                    'menu_class' => 'nav navbar-nav navbar-right',
                                    'fallback_cb' => 'wp_page_menu',
                                    //Process nav menu using our custom nav walker
                                    'walker' => new wp_bootstrap_navwalker())
                                );
                                ?>
                            </div><!-- /.navbar-collapse -->
                        </nav>