dynamic filter for products based on the product added to the product group

We are maintaining fcl field named 'Division' at the header level of lead & opportunity, and based on the division lookup code we are maintaining the product group [same named as the division lov] in the 'Products and products catalog'. So the products in the child object(revenue/product) can dynamic filter based on the division selected in the lead and opportunity.

For example: division is selected as 'hardware' then the user should get the list of products only which are under the division hardware while adding the the single product 'Add product', also in the 'Browse Catalog'