Manual Integration: WP_nav_menu
Replace the following code in the header.php file:
<div class="header-main">
<h1 class="site-title"><a href="<?php echo esc_url( home_url( '/' ) ); ?>" rel="home"><?php bloginfo( 'name' ); ?></a></h1>
<div class="search-toggle">
<a href="#search-container" class="screen-reader-text"><?php _e( 'Search', 'twentyfourteen' ); ?></a>
</div>
<nav id="primary-navigation" class="site-navigation primary-navigation" role="navigation">
<button class="menu-toggle"><?php _e( 'Primary Menu', 'twentyfourteen' ); ?></button>
<a class="screen-reader-text skip-link" href="#content"><?php _e( 'Skip to content', 'twentyfourteen' ); ?></a>
<?php wp_nav_menu( array( 'theme_location' => 'primary', 'menu_class' => 'nav-menu' ) ); ?>
</nav>
</div>
<div id="search-container" class="search-box-wrapper hide">
<div class="search-box">
<?php get_search_form(); ?>
</div>
</div>
With the following –
<?php wp_nav_menu( array( 'theme_location' => 'primary', 'menu_class' => 'nav-menu' ) ); ?>
Take note: Menu location
If you choose to use the wp_nav_menu example, remember to set your menu location under the settings tab in the HeroMenu. Navigate to Hero Menu » Select Menu » Settings » Menu Integration
Example of menu location settings:
