function plt_hide_adding_content_to_the_footer_menus() {
//Hide the "Settings → Adding Content to the Footer" menu.
remove_submenu_page('options-general.php', 'acttf-adding-content-to-the-footer-option');
}
add_action('admin_menu', 'plt_hide_adding_content_to_the_footer_menus', 11);