How to display menu in WordPress?
After registering your menus, use wp_nav_menu() to inform your theme where to display your menus. You can add this code to a header.php file for displaying the registered header-menu:
wp_nav_menu( array( 'theme_location' => 'header-menu' ) );
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Example
wp_nav_menu( array $args = array(
'menu' => "",
'menu_class' => "",
'menu_id' => "",
'container' => "",
'container_class' => "",
'container_id' => "",
'fallback_cb' => "",
'before' => "",
'after' => "",
'link_before' => "",
'link_after' => "",
'echo' => "",
'depth' => "",
'walker' => "",
'theme_location' => "",
'items_wrap' => "",
'item_spacing' => "",
) );
// These are the parameters od this function.