For my case i want to install 2 Xampp into my machine. Basically we can see 2 xampp folder in C: after run installation from xampp.exe.
Just remain the first installation of Xampp as the default. (port 80 and 443).
For second installation of Xampp, change to these file:-
1. C:\xampp_2\apache\conf\httpd.conf - set as below
Now you can restart both your apache and mysql to see the changes. Having multiple services at one time.. :D