Question about super class

[eluser]jedd[/eluser]
Hi shinokada and welcome to the CI forums,

[quote author="shinokada" date="1253992378"]
Q1. Does it mean I don't need to load it, if a class is super class?
[/quote]

Yes, you don't need to explicitly load it anywhere (ignoring the effect of the parent and extends constructs).

Q2. If I extend Controller in applications/libraries/MY_Controller.php, will it be automatically loaded?

MY_Controller - assuming you keep the MY_ prefix as defined in your config - will be looked-for, and loaded automagically. Your Controllers will then need to extend and call MY_Controller as their parent, though, of course.