WordPress: display archive links grouped by year

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I’m currently using wp_get_archives('type=monthly') to display archive links in my sidebar. This is the output: 

<ul>
    <li><a href='http://example.com/2011/08/'>August 2011</a></li>
    <li><a href='http://recently.se/2011/07/'>July 2011</a></li>
    <li><a href='http://recently.se/2010/12/'>December 2010</a></li>
</ul>

Is it possible to group the months by year instead? Something like this:

<ul>
    <h2>2011</h2>
    <li><a href='http://example.com/2011/08/'>August 2011</a></li>
    <li><a href='http://recently.se/2011/07/'>July 2011</a></li>

    <h2>2010</h2>
    <li><a href='http://recently.se/2010/12/'>December 2010</a></li>
</ul>
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  1. This is how I implemented it, although I’m sure there’s a better way. I added these functions to my theme’s functions.php file:

    function twentyeleven_get_archives_callback($item, $index, $currYear) {
    global $wp_locale;

    if ( $item['year'] == $currYear ) {
        $url = get_month_link( $item['year'], $item['month'] );
        // translators: 1: month name, 2: 4-digit year
        $text = sprintf(__('%1$s %2$d'), $wp_locale->get_month($item['month']), $item['year']);
        echo get_archives_link($url, $text);
    }
}

function twentyeleven_get_archives() {
    global $wpdb;

    $query = "SELECT YEAR(post_date) AS `year` FROM $wpdb->posts WHERE `post_type` = 'post' AND `post_status` = 'publish' GROUP BY `year` ORDER BY `year` DESC";
    $arcresults = $wpdb->get_results($query);
    $years = array();

    if ($arcresults) {
        foreach ( (array)$arcresults as $arcresult ) {
            array_push($years, $arcresult->year);
        }
    }

    $query = "SELECT YEAR(post_date) as `year`, MONTH(post_date) as `month` FROM $wpdb->posts WHERE `post_type` = 'post' AND `post_status` = 'publish' GROUP BY `year`, `month` ORDER BY `year` DESC, `month` ASC";
    $arcresults = $wpdb->get_results($query, ARRAY_A);
    $months = array();

    if ( $arcresults ) {
        foreach ($years as $year) {
                    //My Display
            //echo "t<li>ntt<a href="#">$year</a>ntt<ul>n";
            //array_walk($arcresults, "twentyeleven_get_archives_callback", $year);
            //echo "tt</ul>nt</li>n";

                    //Your Display
            echo "t<h2>$year</h2>nt<ul>n";
            array_walk($arcresults, "twentyeleven_get_archives_callback", $year);
            echo "t</ul>n";
        }
    }
}

    You would call this function instead of wp_get_archives() in your theme like so:

    <ul>
<?php twentyeleven_get_archives(); ?>
</ul>

    The function names can be whatever you want, although good practice is to prefix them with your theme’s name (i.e. twentyeleven_)

    I referenced wp_get_archives() and get_archives_link() in wp-includes/general-template.php.