以下是我的自定义帖子类型和类别：

//Register nav
register_nav_menus( array(
    \'main_nav\' => \'Main navigation\'
) );

//Custom post types
add_action( \'init\', \'create_post_type\' );
function create_post_type() {
    register_post_type( \'assets\',
        array(
            \'labels\' => array(
                \'name\' => __( \'Assets\' ),
                \'show_in_nav_menus\' => true,
                \'show_in_menu\' => true,
                \'singular_name\' => __( \'Asset\' )
            ),
        \'public\' => true,
        \'has_archive\' => true,
        )
    );
}

//Custom post type taxonomy/category
add_action( \'init\', \'build_taxonomies\', 0 );
function build_taxonomies() {
    register_taxonomy( \'categories\', \'assets\',
        array(
            \'hierarchical\' => true,
            \'label\' => \'Categories\',
            \'query_var\' => true,
            \'rewrite\' => true
        )
    );
}

即使已打开“show\\u in\\u nav\\u menus”（在导航菜单中显示），它仍然不会显示。我的代码有问题吗？

否则看起来效果不错。谢谢