Wordpress - změna title u widgetu

if ( function_exists('register_sidebar') ) {
    register_sidebar(array(
    'name'=>'Sidebar 1',
        'before_widget' => '<li id="%1$s" class="widget %2$s">',
        'after_widget' => '</li>',
        'before_title' => '<h3 class="widgettitle">',
        'after_title' => '</h3>',
    ));
}