As the title states, I'd like to remove parent slugs from URLs for a particular post type: services.

Something that would change this:

To something like this:

I'd rather not use an additional plugins to accomplish this. I'm currently delivering the CPT via a plugin, which also registers a custom taxonomy.

  • Does your custom post type need to be hierarchical? If not, set that to false and the URLs won't be hierarchical – Matthew Boynes May 28 '13 at 22:35
  • yes, they do need to be hierarchical. this is mainly for archivial pages – NW Tech May 28 '13 at 22:37
up vote 5 down vote accepted

In a quick test, I was surprised to find that this works out of the box. That is, the canonical URI for a child post still has the parent in the path, but the child post works just as well without it (doesn't 404, doesn't redirect). As a result, it should just be a matter of filtering post_type_link to get this to work as you're asking! The following code should do just that:

function wpse_101072_flatten_hierarchies( $post_link, $post ) {
    if ( 'service' != $post->post_type )
        return $post_link;

    $uri = '';
    foreach ( $post->ancestors as $parent ) {
        $uri = get_post( $parent )->post_name . "/" . $uri;

    return str_replace( $uri, '', $post_link );
add_filter( 'post_type_link', 'wpse_101072_flatten_hierarchies', 10, 2 );
  • Minor oversight. When I copied/pasted the code you gave, it didn't work, then I noticed the lack of the 's' on the post type. Boom! Everything is working. Thanks! – NW Tech May 29 '13 at 5:24
  • Awesome, glad you caught that and that it worked as desired! FYI, convention in WordPress is to have your post type singular. "post", "page", etc. – Matthew Boynes May 29 '13 at 13:09
  • 2
    It doesn't work for pages what shoul I change for having instead or instead – Sebastian Nov 18 '13 at 15:30

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