function plt_hide_post_types_order_menus() {
//Hide the "Posts → Re-Order" menu.
remove_submenu_page('edit.php', 'order-post-types-post');
//Hide the "Media → Re-Order" menu.
remove_submenu_page('upload.php', 'order-post-types-attachment');
//Hide the "Settings → Post Types Order" menu.
remove_submenu_page('options-general.php', 'cpto-options');
}
add_action('admin_menu', 'plt_hide_post_types_order_menus', 11);