function plt_hide_custom_code_manager_menus() {
//Hide "Code".
remove_menu_page('code');
//Hide "Code → HTML code".
remove_submenu_page('code', 'code/html');
//Hide "Code → JS code".
remove_submenu_page('code', 'code/js');
//Hide "Code → PHP code".
remove_submenu_page('code', 'code/php');
//Hide "Code → CSS code".
remove_submenu_page('code', 'code/css');
}
add_action('admin_menu', 'plt_hide_custom_code_manager_menus', 1000);