Просмотр файла wordpress/wp-content/themes/classic/functions.php

<?php
if ( function_exists('register_sidebar') )
	register_sidebar(array(
        'before_widget' => '<li id="%1$s" class="widget %2$s">',
        'after_widget' => '</li>',
        'before_title' => '',
        'after_title' => '',
    ));

?>