How to change HTML-code of widgets in WordPress

How to change HTML-code of widgets? I tried to m开发者_如何学运维ake some changes in sidebar.php but no result.

I'll be very grateful for any help.

It's defined in your functions.php file. You can easily change it by passing in the correct options

if (function_exists('register_sidebar')) {
        $opts   = array(
        'name'          =>  'IndexWidgets',
        'before_widget' =>  '<div id="%1$s2" class="home_box %2$s">',
        'after_widget'  =>  '</div></div>',
        'before_title'  =>  '<h2>',
        'after_title'   =>  '</h2><div class="home_box_body">'
    );
    register_sidebar($opts);
}

This is the Wordpress codex link for reference : http://codex.wordpress.org/Function_Reference/register_sidebar