the_category() 使用get_the_category_list() 但此函数无法指定类。但是，您可以使用the_category 钩由于您知道当前类别链接的格式，因此可以对其进行搜索和替换。

它看起来像这样（未经测试）：

add_filter(\'the_category\', \'highlight_current_cats\', 10, 3);
function highlight_current_cats($thelist, $separator, $parents)
{
    // The current cat links will look like <a href="[category link]" [other stuff]
    // We want them it look like <a href="[category link]" class="current-cat" [other stuff]
    $current_cats = get_the_category();
    if ($current_cats) {
        foreach ($current_cats as $cat) {
            $cat_link = get_category_link($cat->term_id);
            $thelist = str_replace(\'<a href="\' . $cat_link . \'"\', \'<a href="\' . $cat_link . \'" class="current-cat"\', $thelist);
        }
    }
    return $thelist;
}