function plt_hide_reviewroll_free_menus() {
//Hide the "ReviewRoll" menu.
remove_menu_page('rvrf_famems');
//Hide the "ReviewRoll → ReviewRoll" menu.
remove_submenu_page('rvrf_famems', 'rvrf_famems');
//Hide the "ReviewRoll → Add ReviewRoll Widget" menu.
remove_submenu_page('rvrf_famems', 'rvrf_add_famems_widget');
}
add_action('admin_menu', 'plt_hide_reviewroll_free_menus', 11);