function plt_hide_bedbooking_reservation_system_menus() {
//Hide the "BedBooking !" menu.
remove_menu_page('bed-booking');
//Hide the "BedBooking ! → Reservation system" menu.
remove_submenu_page('bed-booking', 'bed-booking-system');
}
add_action('admin_menu', 'plt_hide_bedbooking_reservation_system_menus', 11);