Campbell was originally with the Bromley academy before going on to have spells with Dulwich Hamlet and Merstham before returning to Hayes Lane last year.
Manager Neil Smith told Bromley`s official website: “Kristian has been getting game time at Bognor and is clearly enjoying his football at the moment. We’re delighted with his continued development. Kristian remains a Bromley player and continues to train with ourselves daily and he is very much part of our long-term future.
“We’d also like to thank Bognor Regis Town for giving Kristian this great opportunity”.