Custom search on Silverstripe project -- 2

I have almost ready page based on Silverstripe CMS. Its a product catalog. There are: [login to view URL] - category page [login to view URL] - subcategory page [login to view URL] - product - DataObjects which belong to [login to view URL] [login to view URL] - type of product- which belong to PodDzial (has_one) and to Produkt (has_many) [login to view URL] - brand of product- which belong to Dzial (has_one) and to Produkt (has_many) I work on custom search on PodDzial page. This page list product as on attachment image. There are two dropdown search fields Select Marka and select Kategoria. My is problem is that first show all Marka's and second all Kategoria's. Not only parent as I wish. In attachments: searchcode which I use on [login to view URL] image how look serch zip archive with mysite files and template ss files (upload to any theme)