Services Category List

I need a services category list which will include all possible services provided. The idea here is to have main category list and sub category so that users can easily identify which main category to choose for their needs. You can refer craigslist services section to see their category list (its just an example). I am attaching other services list (possible sub-category) here. In general I would not want the main category to be more than 10-15 and sub category in each main section to be more than 10-15. So the list should be more broad rather than detailed. For.e.g Main category (home) sub category: house cleaning, lawn mowing etc. Main category (automotive) sub category: mobile detail cleaning. This list should cover all possible offered services