For this you will need to use the PHP framework extension:
you will need to create a separate results page for each category, then add them to the main results page as dynamic plugins
go to the bindings panel, click the plus button and select URL variable. name the URL variable category.
when adding the dynamic plugin, use the category url variable as the trigger
you can set it to load the cars results page id the category UR variable is equal to cars:
and the bots results page if the category equal boats: