Are you looking to do this using Javascript (i.e. you select a radio button and the table changes on the page), or just with PHP (you select a radio button, submit the form, it reloads teh page with a different table)?
If you're just using PHP, you want to look at the formslib documentation on how to create and handle forms in Moodle. You might also want to look at the methods for outputting tables, which you can do using Templates (recommended if you're on Moodle >= 2.9) or Output Components.
If you want to use Javascript as well, you'll need to know how to use jQuery to detect the radio button being selected, make an AJAX request to send the selected value to a PHP script, and display the new table. You'll then need to create a Javascript module containing the Javascript, and a PHP script for it to call which either returns the data for the table, or the HTML for the table itself.
