Parent as url/breadcrumb but not page

Typically, if you want to add a category to a page, you really should be using a custom post type. If you use a hierarchical custom post type, you can have Breadcrumb NavXT use post parents as the first hierarchy and then a taxonomy as a secondary hierarchy (fulfilling what you want out of the breadcrumb trail). As for making the permalinks the way you want, my guess is it’s probably possible (especially is you use a custom post type and custom taxonomy). That said, it has been quite a while since I’ve dived deeply into permalinks and custom rewrite rules so I don’t have an example off hand to point you to.

Thanks for help!

Just for information, I could use custom post but it would not make sense since they just are regular pages. I finally created blank pages for level 1, and made my hierarchy in pages. Then I disabled all links from level 1 for breadcrumb (and menu) with this code :

add_filter('bcn_breadcrumb_url', 'my_breadcrumb_url_stripper', 3, 10);
function my_breadcrumb_url_stripper($url, $type, $id)
{
    if(in_array('post-page', $type) && in_array((int) $id, array(121)))
    {
        $url = NULL;
    }
    return $url;
}