希望这能解决你的问题

function my_custom_post_type() {
$labels = array(
    \'name\' => _x(\'Projects\', \'post type general name\'),
    \'singular_name\' => _x(\'Project\', \'post type singular name\'),
    \'add_new\' => _x(\'Add New\', \'project item\'),
    \'add_new_item\' => __(\'Add New Project\'),
    \'edit_item\' => __(\'Edit Project\'),
    \'new_item\' => __(\'New Project\'),
    \'view_item\' => __(\'View Project\'),
    \'search_items\' => __(\'Search Projects\'),
    \'not_found\' =>  __(\'Nothing found\'),
    \'not_found_in_trash\' => __(\'Nothing found in Trash\'),
    \'parent_item_colon\' => \'\',
    \'menu_name\' => \'Projects\' 
);

$args = array(
    \'labels\' => $labels,
    \'public\' => true,
    \'publicly_queryable\' => true,
        \'hierarchical\' => false,
        \'has_archive\' => true,
    \'rewrite\' => array(\'slug\'=>\'work\', \'with_front\'=>false),
    \'show_ui\' => true,
    \'_builtin\' => false, // It\'s a custom post type, not built in!
    \'capability_type\' => \'post\',
        \'query_var\' => true, // This goes to the WP_Query schema
    \'menu_position\' => null,
    \'supports\' => array(\'title\',\'editor\',\'thumbnail\', \'comments\', \'author\', \'excerpt\')
);

register_post_type( \'work\' , $args );

}
function my_custom_taxonomies() {

    $labels = array(
        \'name\' => __( \'Taxonomy\', \'taxonomy general name\' ),
        \'singular_name\' => __( \'Taxonomy\', \'taxonomy singular name\' ),
        \'search_items\' =>  __( \'Search Taxonomy\' ),
        \'all_items\' => __( \'All Taxonomy\' ),
        \'parent_item\' => __( \'Parent Taxonomy\' ),
        \'parent_item_colon\' => __( \'Parent Taxonomy:\' ),
        \'edit_item\' => __( \'Edit Taxonomy\' ), 
        \'update_item\' => __( \'Update Taxonomy\' ),
        \'add_new_item\' => __( \'Add New Taxonomy\' ),
        \'new_item_name\' => __( \'New Taxonomy Name\' ),
        \'menu_name\' => __( \'Taxonomy\' ),
    );  

    register_taxonomy( \'taxonomy\', array(\'work\'), array (
                    \'labels\' => $labels,
                    \'hierarchical\' =>false,
                    \'show_ui\' => true,
                    \'rewrite\' => array( \'slug\' => \'work/taxonomy\'),
                    \'query_var\' => true,
                    \'show_in_nav_menus\' => true,
                    \'public\' => true,
            ));
}

add_action(\'init\', \'my_custom_post_type\', 0);
add_action(\'init\', \'my_custom_taxonomies\', 10);

我也有同样的问题，经过很多努力，我最终找到了这个解决方案
只需将此添加到您的代码中

global $wp_rewrite;
$wp_rewrite->flush_rules(); 

function my_custom_post_type() {
    $labels = array(
        \'name\' => _x(\'Projects\', \'post type general name\'),
        \'singular_name\' => _x(\'Project\', \'post type singular name\'),
        \'add_new\' => _x(\'Add New\', \'project item\'),
        \'add_new_item\' => __(\'Add New Project\'),
        \'edit_item\' => __(\'Edit Project\'),
        \'new_item\' => __(\'New Project\'),
        \'view_item\' => __(\'View Project\'),
        \'search_items\' => __(\'Search Projects\'),
        \'not_found\' =>  __(\'Nothing found\'),
        \'not_found_in_trash\' => __(\'Nothing found in Trash\'),
        \'parent_item_colon\' => \'\',
        \'menu_name\' => \'Projects\' 
    );

    $args = array(
        \'labels\' => $labels,
        \'public\' => true,
        \'publicly_queryable\' => true,
            \'hierarchical\' => false,
            \'has_archive\' => true,
        \'rewrite\' => array(\'slug\'=>\'work\', \'with_front\'=>false),
        \'show_ui\' => true,
        \'_builtin\' => false, // It\'s a custom post type, not built in!
        \'capability_type\' => \'post\',
            \'query_var\' => true, // This goes to the WP_Query schema
        \'menu_position\' => null,
        \'supports\' => array(\'title\',\'editor\',\'thumbnail\', \'comments\', \'author\', \'excerpt\')
    );

    register_post_type( \'work\' , $args );

    global $wp_rewrite;   
    $wp_rewrite->flush_rules();    // this should help 
}

更详细的解释是on another post, 但以下是您需要添加的基本部分：

注册分类法和cpt。确保taxo的重写段标为“basename”，cpt的重写段标为“basename/%tax\\u name%”。

告诉wordpress如何处理“%tax\\u name%”，如下所示：

function filter_post_type_link($link, $post)
{
if ($post->post_type != \'custom_post_type_name\')
    return $link;

if ($cats = get_the_terms($post->ID, \'taxonomy_name\'))
{
    $link = str_replace(\'%taxonomy_name%\',array_pop($cats)->term_id, link); // see custom function defined below
}
return $link;
}
add_filter(\'post_type_link\', \'filter_post_type_link\', 10, 2);