You need to first determine the portion of the landscape timber edging that has termite damage or is rotting. Once you have determined all of the portions, remove the damaged timber with a spade. Be careful not to disturb the concrete pavers of the driveway in order to not make your job harder. Get measuring tape and measure out the portion that you removed. Purchase timber edging with the appropriate dimensions and cut them to the measured length. Apply some wood preservative on the timber so that it will be protected from the elements. Place the timber on the space where the old ones used to be. Use a rubber mallet to hammer them into place.