Changing a Leo is like convincing a cow to eat meat. The task is almost impossible. The only trick you can try is to find the right moment to put forth the idea. Ideally, when your husband is relaxed and emotionally vulnerable, put your notion across but make it seem more like a suggestion. Another great way to get him to change is to appeal to his vanity and pride. Approach his egoistic nature and make sure that your man thinks that the idea or decision is his only.