What Where When

My goal is to build a website with PHP/MySQL to build pages like [login to view URL] For each item country,city,category,date we have a title, a text description and a URL. Each item can have multiple comment posted (name, email, comment) The list of category by country must be editable in a table The list of city-ZIPcode by country must be editable in a table The items can be added from the pages? Also i need a way to import item from text files and / or XML