Programmable delay line in CycloneIII

The cyclone III family has programmable delays on all of the I/O pins. These values are accessible through the assignment editor. The values are generally fixed at each compile. If you want programmable delay on the order that you are mentioning, I would recommend an external delay element like an ON-semi MC100E195. As a third option, you can use the delay in the mega-function of a PLL clock to provide varying delays. The PLLs can be configured in real time, and so you can change the phase delay.