get_the_category_list 通过过滤器运行it输出the_category. 你可以在那里挂上钩，想换什么就换什么。像这样的方法应该有效（未经测试）：

<?php
add_filter(\'the_category\', \'wpse90955_the_category\');
function wpse90955_the_category($cat_list)
{
    return str_ireplace(\'<a\', \'<a target="_parent"\', $cat_list);
}

<?php
// assume wpse90955_the_category was defined elsewhere and is already loaded
add_filter(\'the_category\', \'wpse90955_the_category\');
echo get_the_category_list($some_sep, $parents, $some_post_id);
remove_filter(\'the_category\', \'wpse90955_the_category\');