function plt_hide_mappress_google_maps_for_wordpress_menus() {
//Hide "MapPress".
remove_menu_page('mappress');
//Hide "MapPress → Settings".
remove_submenu_page('mappress', 'mappress');
//Hide "MapPress → Maps".
remove_submenu_page('mappress', 'mappress_maps');
//Hide "MapPress → Support".
remove_submenu_page('mappress', 'mappress_support');
}
add_action('admin_menu', 'plt_hide_mappress_google_maps_for_wordpress_menus', 11);