I'm in multisite where some blogs share the same parent theme for maintenance reasons. All my cpts come from that parent theme, but I would really like that, for one of the blogs, it had an URL mask.

I found this answer very useful to change labels, but I've tried to do the same and assign a different slug to $wp_post_types[$post_type]->rewrite['slug'] and it fails, bringing the whole rewrite array to NULL.

I've also tried .htacces with RewriteRule ^/newslug$ /oldslug [L] but with no success.

Is there a clean way to do this?

1 Answer 1


Make the slug translatable when you register the custom post type:

    array (
        'rewrite' => array (
            'slug' => _x( 'post_type_name', 'URL slug', 'your_text_domain' )

Then create a small plugin for the site where you want to change the slug:

add_filter( 'gettext_with_context', 'change_my_slug', 10, 4 );

function change_my_slug( $translation, $text, $context, $domain )
    if ( 'URL slug' !== $context or 'post_type_name' !== $text or 'your_text_domain' !== $domain )
        return $translation;

    return 'changed-slug';

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