Pallet planters are not that difficult to build. Place vertical beams of pallet on the brick wall for support then fix four by one pallet cases or pallet planter on them. Use lights to decorate them and also hang cages to make the look complete.
Note to self: remember this as an idea for cat friendly living room. Add dark rustic floating shelves on the side and create one long platform across the top. Add invisible floating shelves on adjacent walls for more kitty mobility.