Changing a Tab link to another page

Hi All
I have a project which has over a thousand fields. All the fields need to be updated for each record. I initially broke the fields down into Tabs on the Add and Edit pages but everything is too slow.
My idea now is to break the fields down into seperate tables and to load each table as required.
I still want to use the Tabs on the Add and Edit pages but want to be able to click the Tabs and use them to link to individual pages.
My problem is that I am not sure how to code this or where the code needs to go.
I hope this makes sense, any help is greatly appreciated,
Paul