我认为最简单的方法就是使用WordPress已经生成的类别档案。将永久链接设置中的类别库更改为issues 所以你有很好的URL，然后在category template, 检查您是否正在查看顶级类别或子类别，并显示相应的标记：

$this_category = get_queried_object();

// if parent is 0, category is top level
if( 0 == $this_category->parent ) :

    // top level category,
    // show child categories of this issue
    $args = array(
        \'child_of\' => $this_category->term_id,
        \'title_li\' => \'\',
        \'hide_empty\' => 0
    );

    // output a list of child cats for this issue
    // see also get_categories or get_terms if you wish to use your own markup
    wp_list_categories( $args );

else :

    // child category,
    // show articles in this subcategory, etc.
    echo \'child category\';

endif;