这可以通过以下方法实现get_blog_list, originally by Frank Bueltge, 并修改为还返回每个博客的名称和描述。Attention to the use 属于get_current_blog_id() 和switch_to_blog().

/**
 * Returns an array of arrays containing information about each public blog 
 * hosted on this WPMU install.
 * 
 * Only blogs marked as public and flagged as safe (mature flag off) are returned.
 *
 * @author Frank Bueltge
 * 
 * @param   Integer  The first blog to return in the array.
 * @param   Integer  The number of blogs to return in the array (thus the size of the array).
 *                   Setting this to string \'all\' returns all blogs from $start
 * @param   Boolean  Get also Postcount for each blog, default is False for a better performance
 * @param   Integer  Time until expiration in seconds, default 86400s (1day)
 * @return  Array    Returns an array of arrays each representing a blog. 
 *                   Details are represented in the following format:
 *                       blog_id   (integer) ID of blog detailed.
 *                       domain    (string)  Domain used to access this blog.
 *                       path      (string)  Path used to access this blog.
 *                       postcount (integer) The number of posts in this blog.
 *                       name      (string) Blog name.
 *                       desc      (string) Blog description.
 */
function b5f_get_blog_list( $start = 0, $num = 10, $details = FALSE, $expires = 86400 ) {

    // get blog list from cache
    $blogs = get_site_transient( \'multisite_blog_list\' );

    // For debugging purpose
    if ( defined( \'WP_DEBUG\' ) && WP_DEBUG )
        $blogs = FALSE;

    if ( FALSE === $blogs ) {

        global $wpdb;

        // add limit for select
        if ( \'all\' === $num )
            $limit = \'\';
        else
            $limit = "LIMIT $start, $num";

        $blogs = $wpdb->get_results(
            $wpdb->prepare( "
                SELECT blog_id, domain, path 
                FROM $wpdb->blogs
                WHERE site_id = %d 
                AND public = \'1\' 
                AND archived = \'0\' 
                AND mature = \'0\' 
                AND spam = \'0\' 
                AND deleted = \'0\' 
                ORDER BY registered ASC
                $limit
            ", $wpdb->siteid ), 
        ARRAY_A );

        // Set the Transient cache
        set_site_transient( \'multisite_blog_list\', $blogs, $expires );
    }

    // only if usable, set via var
    if ( TRUE === $details ) {

        $blog_list = get_site_transient( \'multisite_blog_list_details\' );

        // For debugging purpose
        if ( defined( \'WP_DEBUG\' ) && WP_DEBUG )
            $blog_list = FALSE;

        if ( FALSE === $blog_list ) {

            global $wpdb;
            $current_blog_id = get_current_blog_id();
            foreach ( (array) $blogs as $details ) {
                $blog_list[ $details[\'blog_id\'] ] = $details;
                $blog_list[ $details[\'blog_id\'] ][\'postcount\'] = $wpdb->get_var( "
                    SELECT COUNT(ID) 
                    FROM " . $wpdb->get_blog_prefix( $details[\'blog_id\'] ). "posts 
                    WHERE post_status=\'publish\' 
                    AND post_type=\'page\'" 
                );
                switch_to_blog( $details[\'blog_id\'] );
                $blog_list[ $details[\'blog_id\'] ][\'name\'] = get_blog_details()->blogname;
                $blog_list[ $details[\'blog_id\'] ][\'desc\'] = get_bloginfo( \'description\' );
            }
            switch_to_blog( $current_blog_id );
            // Set the Transient cache
            set_site_transient( \'multisite_blog_list_details\', $blog_list, $expires );
        }
        unset( $blogs );
        $blogs = $blog_list;
    }

    if ( FALSE === is_array( $blogs ) )
        return array();

    return $blogs;
}

$blogs = b5f_get_blog_list( 0, \'all\', true );
uasort( $blogs, function( $a, $b ) {
    return strcasecmp( $a[\'name\'], $b[\'name\'] );
});
$current_blog_id = get_current_blog_id();
foreach( $blogs as $blog ) :
    switch_to_blog( $blog[ \'blog_id\' ] );
    echo $blog[\'name\'] . \' - \' . $blog[\'domain\'] . \' - \' . $blog[\'desc\'];
endforeach;
switch_to_blog( $current_blog_id );