Greyd.Suite global taxonomies enable you to create taxonomies that apply to several post types. However, you might also want to use the default "categories" of your default posts as a global taxonomy.
You can easily do that by creating a taxonomy with the slug "Category", as this automatically references the default category. You can then assign this taxonomy to all your post types.
Alternatively, you can also use the following snippet to achieve the same:
/**
* Register the 'category' taxonomy for other post types
*/
function register_category_for_nav() {
register_taxonomy_for_object_type( 'category', 'vacature' );
}
add_action( 'init', 'register_category_for_nav', 12 );
Simply include this snippet in for example the functions.php of your child theme or a similar place. Make sure to change the slug vacature to the correct name of your post type (you can see it in the URL when looking at the post type in the backend like this: ?post_type=xxx ).