function plt_hide_mango_buttons_menus() {
//Hide the "Mango Buttons" menu.
remove_menu_page('mangobuttons');
//Hide the "Mango Buttons → Settings" menu.
remove_submenu_page('mangobuttons', 'mangobuttons');
//Hide the "Mango Buttons → Help" menu.
remove_submenu_page('mangobuttons', 'mangobuttons-help');
}
add_action('admin_menu', 'plt_hide_mango_buttons_menus', 11);