Adding Layered Nav, you are setting which attribute to show. Show only those, which have products. There are no other options.

– It’s set to one attribute “Size”. They all have products inside. But when i go thru categories in depth, for example from one category to subcategory, the filter shows all the filter options, some with products and some with no product.

I need hook, – function hook , which will display only filter options with products inside. For example check the previous screenshot hide attribut.jpg

There are filters by size with 0 products, shown. But in some other categories they have products.

Regards