长话短说，这个问题的答案是肯定的。

最后，我能够创建：tax-1/tax-2/cpt-1/cpt-1-post/cpt-2/cpt-2-post/

还有另一个结构：tax-1/tax-2/cpt-1/cpt-1-post/cpt-2/custom field/cpt-2-post/

我使用的类型来自http://wp-types.com/ 要创建分层自定义分类法，需要自定义帖子类型、自定义字段，但最重要的是自定义帖子类型之间的父/子关系。那个插件节省了很多时间。

下一步是使用正则表达式重新写入URL。

    <?php


    // Add custom rewrite rules

    add_filter( \'rewrite_rules_array\',\'my_insert_rewrite_rules\' );

    // Add custom variable for WP_QUERY

    add_filter( \'query_vars\',\'my_insert_query_vars\' );

    // This hook is fired once WP, all plugins, and the theme are fully loaded and instantiated.

    add_action( \'wp_loaded\',\'my_flush_rules\' );

    // Flush rules for include custom rewrite rules

    function my_flush_rules(){
        $rules = get_option( \'rewrite_rules\' );
        global $wp_rewrite;
        $wp_rewrite->flush_rules();
    }

    // Add custom rewrite rules

    function my_insert_rewrite_rules( $rules ){
        $newrules = array();  

        $location_list = get_terms("location",array("parent" => 0, "hide_empty" => 0));
        foreach($location_list as $location){
            $base_url = sprintf(\'index.php?taxonomy=%s&term=%s&child_term=$matches[1]&type=$matches[2]&type_title=$matches[3]&media_type=$matches[4]&media_maintitle=$matches[5]&media_title=$matches[6]\',\'location\',$location->slug);
            $newrules[$location->slug.\'/([^/]+)/([^/]+)/([^/]+)/([^/]+)/([^/]+)/([^/]+)/?\'] = $base_url;
            $base_url = sprintf(\'index.php?taxonomy=%s&term=%s&child_term=$matches[1]&type=$matches[2]&type_title=$matches[3]&media_type=$matches[4]&media_title=$matches[5]\',\'location\',$location->slug);        
            $newrules[$location->slug.\'/([^/]+)/([^/]+)/([^/]+)/([^/]+)/([^/]+)/?\'] = $base_url;
            $base_url = sprintf(\'index.php?taxonomy=%s&term=%s&child_term=$matches[1]&type=$matches[2]&type_title=$matches[3]&media_type=$matches[4]\',\'location\',$location->slug);        
            $newrules[$location->slug.\'/([^/]+)/([^/]+)/([^/]+)/([^/]+)/?\'] = $base_url;
            $base_url = sprintf(\'index.php?taxonomy=%s&term=%s&child_term=$matches[1]&type=$matches[2]&type_title=$matches[3]\',\'location\',$location->slug);        
            $newrules[$location->slug.\'/([^/]+)/([^/]+)/([^/]+)/?\'] = $base_url;
            $base_url = sprintf(\'index.php?taxonomy=%s&term=%s&child_term=$matches[1]&type=$matches[2]\',\'location\',$location->slug);        
            $newrules[$location->slug.\'/([^/]+)/([^/]+)/?\'] = $base_url;
            $base_url = sprintf(\'index.php?taxonomy=%s&term=%s&child_term=$matches[1]\',\'location\',$location->slug);        
            $newrules[$location->slug.\'/([^/]+)/?\'] = $base_url;
        }

        return $newrules + $rules;
    }

    // Add custom variable for WP_QUERY

    function my_insert_query_vars( $vars ){                                                                                               
        array_push($vars, \'taxonomy\');          
        array_push($vars, \'child_term\');                   
        array_push($vars, \'type\');                       
        array_push($vars, \'type_title\');                           
        array_push($vars, \'media_type\');                                
        array_push($vars, \'media_maintitle\');                    
        array_push($vars, \'media_title\'); 
        return $vars;
    }

    ?>

答案比我在这里发布的更多，但我认为我可以发布的行数是有限的。