function plt_hide_buttons_menus() {
//Hide the "Wow Plugins" menu.
remove_menu_page('wow-company');
//Hide the "Wow Plugins → Hey" menu.
remove_submenu_page('wow-company', 'wow-company');
//Hide the "Wow Plugins → Buttons" menu.
remove_submenu_page('wow-company', 'wow-buttons');
}
add_action('admin_menu', 'plt_hide_buttons_menus', 11);