菜单种类：

• 桌面水平菜单-primary
• 桌面展开式菜单-expanded
• 移动菜单-mobile
• 页脚菜单-footer
• 社交网络菜单-social

functions.php

/**
 * Register navigation menus uses wp_nav_menu in five places.
 */
function twentytwenty_menus() {

	$locations = array(
		'primary'  => __( 'Desktop Horizontal Menu', 'twentytwenty' ),
		'expanded' => __( 'Desktop Expanded Menu', 'twentytwenty' ),
		'mobile'   => __( 'Mobile Menu', 'twentytwenty' ),
		'footer'   => __( 'Footer Menu', 'twentytwenty' ),
		'social'   => __( 'Social Menu', 'twentytwenty' ),
	);

	register_nav_menus( $locations );
}

add_action( 'init', 'twentytwenty_menus' );