Inclui o Menu Dinâmico no WordPress.

functions.php

// Menu Dinâmico
add_action( 'init', 'menu_dinamico' );
function menu_dinamico(){
    register_nav_menus(
        array(
            'top-menu'    => __( 'Menu Topo' ),
            'main-menu'   => __( 'Menu Principal' ),
            'footer-menu' => __( 'Menu Rodapé' )
        )
    );
}