I had something like this at my cousin's when I was a child. I remember my aunt telling me about how to make it; but she has since passed away some years ago. I experimented a little, et voila! My family and friends love it! It's awesome served hot with a scoop of vanilla ice cream.
Preheat oven to 350 degrees. Grease or spray with vegetable spray a 13 x 9 x 3 pan.
Dump un-drained pineapple into pan; spread evenly. Dump in pie filling and spread into even layer. Dump dry cake mix onto pie filling layer; spread evenly. Sprinkle nuts over cake mix layer. Place slices of butter evenly over top.