<?php

/*
 * Plugin Name: Two Top Level Menus [18943]
 */

function two_top_level_menus() {
	add_menu_page( 'ONE', 'ONE', 'read', 'menu-one', 'two_top_level_menus_one' );
	add_submenu_page( 'menu-one', 'SUB ONE', 'SUB ONE', 'read', 'menu-sub-one', 'two_top_level_menus_sub_one' );
	add_menu_page( 'TWO', 'TWO', 'read', 'menu-two', 'two_top_level_menus_two' );
	add_submenu_page( 'menu-two', 'SUB TWO', 'SUB TWO', 'read', 'menu-sub-two', 'two_top_level_menus_sub_two' );

	convert_to_screen( 'menu-one' );
}

function two_top_level_menus_one() {
	echo "ONE";
}

function two_top_level_menus_sub_one() {
	echo "SUB ONE";
}

function two_top_level_menus_two() {
	echo "TWO";
}

function two_top_level_menus_sub_two() {
	echo "SUB TWO";
}

add_action( 'admin_menu', 'two_top_level_menus' );