function plt_hide_igniteup_menus() {
//Hide "IgniteUp".
remove_menu_page('cscs_templates');
//Hide "IgniteUp → Templates".
remove_submenu_page('cscs_templates', 'cscs_templates');
//Hide "IgniteUp → Subscribers".
remove_submenu_page('cscs_templates', 'cscs_subscribers');
//Hide "IgniteUp → Options".
remove_submenu_page('cscs_templates', 'cscs_options');
}
add_action('admin_menu', 'plt_hide_igniteup_menus', 11);