Show alert that you must login first for Report listing

Question - I have little issue . There is an option in website "Report Listing" for Product.

But this option is enable for all user. Whenever anyone click on Report listing I want to show an alert that you must login first ..

 or It is possible to show Report listing option only for login User.

If possible please tell me the solution.. because i am getting many fake report listing error.

Solution  --

Go to your file manager and open item.php file and find report listing and paste the attached code (image) there.