How do I update my user defined field with the Folder name in tes plan module

Hi All,

Please reply me with a solution .

I have created a user defined field as Application Name for the test case in the Test plan module.

But my folder structurer in the Test plan module is

Fucntionality

          functional test cases

               Sub Fucntionality

                 test cases

The above structure always remains same.So whenver I select the test case and see the Application name field it should be the Functionality name.How do I update my user defined field with the Folder name .Please provide me the work flow details.