function plt_hide_theme_my_login_menus() {
//Hide the "Theme My Login" menu.
remove_menu_page('theme-my-login');
//Hide the "Theme My Login → General" menu.
remove_submenu_page('theme-my-login', 'theme-my-login');
//Hide the "Theme My Login → Extensions" menu.
remove_submenu_page('theme-my-login', 'theme-my-login-extensions');
}
add_action('admin_menu', 'plt_hide_theme_my_login_menus', 11);