Category count inside the link

Is it possible using wp_list_categories set count of post in category in the href?

Regular expression jiggery pokery identified:

<?php
$categories = wp_list_categories('title_li=&show_count=1&echo=0');
$categories = preg_replace('/<\/a> \(([0-9]+)\)/', ' <span class="count">[\\1]</span></a>', $categories);
echo $categories;
?>