Display filter_id in product/category

Version 3.0.4.0
Would like to display the filter_id from oc_product_filter table above product image on the category page.
It is on a development site where I need a way to scroll quickly the products and check my product filters. No need pull data from oc_filter... table, only have 1 group and 5 filters, so just the id would definitely help.
Thanks