Parent class to call children method

[eluser]Unknown[/eluser]
Is it possible to call child class method from parent class method, normally in OOPS concept we declare the parent class as virtual and I think this provides the method to call child class method from parent class. Please help me out to accomplish this in codeignitor.
Actually My intension is to have a common function dealing with the insertion of the form.
I have a master controller where take a function and the arguments to this function is the controller name,so i need to route to call other controller from my master controller.