Auto Unhide Columns in Pivot Table

Hi,

I have a pivot table I am working with, and it is a budget running from July 2013 - June 2014. I had data added at the end of the pivot table, therefore have allotted the correct number of columns for the pivot table to expand to full capacity without removing the additional data. I would like as I add data in, the columns of the pivot table to "auto-unhide".

See attached workbook.