Long-grain rice cooked according to package directions. Bring kidney beans to a boil. Drain and rinse. Put back into pot and cover with water. Add ham hock, bay leaves, celery, onions, Cajun spice, garlic, salt and pepper. Bring to a slow boil. Turn down to medium heat and simmer until beans are tender (about 2-3 hours). Slice kielbasa and add to beans. Heat through. Serve over long-grain white rice.