The vertebrates traditionally include the hagfish, which do not have proper vertebrae, though their closest living relatives, the lampreys, do. Hagfish do, however, possess a cranium. For this reason, the vertebrate subphylum is sometimes referred to as  Craniata  when discussing morphology.
Kitchari is an Indian dish often used for cleansing. When used alone as a mono-diet, it's called a kitchari cleanse, but it can be used in conjunction with other wholesome foods as a part of a cleansing diet. The link above has several different kitchari recipes.
Even when I wasn't having a UTI, I had irritation and burning in my bladder that got worse with any spicy food, onions, tomatoes, carbonated drinks, alcohol, or caffeine (although the specific irritant foods may be different for different people). Try to avoid foods that irritate you so your bladder can heal faster.