Yii supplier and category application

I am building an application which parses bank statements. For each line on the statement the application will attempt to determine who the supplier was and what category the transaction should be put in. This will allow the user to automatically view where and in what categories they are spending their money. I need someone who can enhance an existing YII application to do the following: 1. Add a category hierarchy (supplied). This will be imported from a text file and should be stored in an appropriate data structure eg, nested sets, so that the hierarchy is maintained and can be easily queried 2. Allow a supplier to be assigned to one or more categories. There is already a supplier table with gii generated CRUD functionality. There should also be a way of viewing suppliers by category (including in child categories) 3. Enhance an existing UI to allow a list of transactions (existing model) to be mapped to one or more categories and a supplier. This is a jquery driven UI. The application is on github and access will be given to the successful applicant. To be considered you must have excellent English; there will be a skype interview, so please no spam/time wasters. You must also have experience with Yii.