Confirm Form Resubmission

I get this error / warning whenever I click the browser back button.

Here is the process of the web pages.
1. There is a search page that the user puts information for searching
2. When the user clicks search, it goes to the controller and gets data from the model and puts this data in a view
3. When the list of data is displayed, the user can click on any of the rows and this will display the details for that row
4. When the user clicks on the back button of the browser when the details are being displayed, they get this error.

What is the proper way of handling this in CodeIgniter?

Thank you all for your responses.