我正在使用wp_list_categories() 从特定的作者ID打印出每个类别的链接，这很好。然而，我还想添加一个div 致各li 将保留类别的图标。我怎样才能做到这一点？

这是我当前的代码：

<?php
    // Display a list of all categories associated with author
    $cat_array = array();
    $args = array(
        \'author\' => $author_id,
        \'showposts\' => -1,
        \'data-filter\' => \'category\',
        \'ignore_sticky_posts\' => 1,
    );
    $author_posts = get_posts($args);
    if($author_posts) {
        foreach ($author_posts as $author_post ) {
            foreach(get_the_category($author_post->ID) as $category) {
                $cat_array[$category->term_id] =  $category->term_id;
            }
        }
    }
    $cat_ids = implode(\',\', $cat_array);
    wp_list_categories(\'include=\'.$cat_ids.\'&title_li=\');
?>