Fortunately, there is an easy fix for this.
The $item in the Walker delivers Classes, and if the menu item is an archive, you get one of those:
- menu-item-type-taxonomy (general)
- menu-item-object-product_cat (product_cat == taxonomyname)
as well as
- $item->type == ‘taxonomy’
- $item->object == ‘your_taxonomy’
If you want this logic to work for various Archives (not just the product_cat) you need to change the taxonomy as well – again, $item conveniently delivers your $taxonomy as $item->object.
Now you only need to change your if and the taxonomy in your Walker
if( $item->type == 'taxonomy' ) {
$non_empty_categories = get_categories( array( 'taxonomy' => $item->object ) );
// ... The rest of your logic works fine
}
Should work just fine 🙂