简单一点。

<?php
/*
Plugin Name: Sort My-Sites
Description: Sorts the My Sites listing on both the page and in the 3.3 admin bar dropdown
Author: Otto
*/

add_filter(\'get_blogs_of_user\',\'sort_my_sites\');
function sort_my_sites($blogs) {
        $f = create_function(\'$a,$b\',\'return strcasecmp($a->blogname,$b->blogname);\');
        uasort($blogs, $f);
        return $blogs;
}

add_filter(\'get_blogs_of_user\', function( $blogs ) {
    uasort( $blogs, function( $a, $b ) { 
        return strcasecmp( $a->blogname, $b->blogname );
    });
    return $blogs;
});