我想显示具有给定自定义分类法的帖子的类别列表。

然后，到每个类别归档的链接应该在末尾包括这样的自定义分类法：mysite。com/类别/catname/？分类法=分类名称

这应该是一个自定义函数，我不知道如何创建它，我可以在我的主题文件中使用，但我从另一个答案中得到了这个稍微修改的代码(https://wordpress.stackexchange.com/a/97926/195913) 作为起点：

function double_term_tree(
$post_types = \'post\',
$first      = \'category\',
$second     = \'taxonomy\'
)
{
    $query = new WP_Query(
        array (
            \'numberposts\'      => -1,
            \'suppress_filters\' => TRUE,
            \'posts_per_page\'   => -1,
            \'post_type\'        => $post_types,
            \'tax_query\'        => array (
                \'relation\' => \'AND\',
                array(
                    \'taxonomy\' => $first,
                    \'field\'    => \'id\',
                    \'terms\'    => get_terms( $first, array( \'fields\' => \'ids\' ) )
                ),
                array(
                    \'taxonomy\' => $second,
                    \'field\'    => \'id\',
                    \'terms\'    => get_terms( $second, array( \'fields\' => \'ids\' ) )
                ),
            ),
        )
    );

    if ( empty ( $query->posts ) )
        return;

    $result_list = array();
    $output      = \'<ul>\';

    foreach ( $query->posts as $post )
    {
        $first_terms  = get_the_term_list( $post->ID, $first, \'\', \'|\' );
        $second_terms = get_the_term_list( $post->ID, $second, \'\', \'|\' );

        $f_term_array = explode( \'|\', $first_terms );
        $s_term_array = explode( \'|\', $second_terms );

        foreach ( $f_term_array as $f_term )
        {
            if ( ! isset ( $result_list[ $f_term ] ) )
                $result_list[ $f_term ] = array();

            $result_list[ $f_term ] = array_merge( $result_list[ $f_term ], $s_term_array );
        }
    }

    foreach ( $result_list as $k => $v )
    {
        $result_list[ $k ] = array_unique( $v );
        $output           .= "\\n<li>$k\\n\\t<ul>\\n\\t\\t<li>"
            . join( "</li>\\n\\t\\t<li>", array_unique( $v ) )
            . "</li>\\n\\t</ul>\\n</li>";
    }

    $output .= \'</ul>\';

    return $output;
}

echo double_term_tree( \'post\', \'taxname\', \'catname\' );