Please, gilshultz, GoForSmoke, and UKHeliBob, please stop doing that. You are only causing confusion. Investigate the Adafruit Motor Shield. Buy a clone to test it. Look at the schematic. See for yourself how the pins are used. Look at RF24 libraries and how almost everyone uses hardware SPI. At least give links to how to switch to other pins.
hicksyy1, I'm sorry, but the others don't know what they are talking about. Most of time, the majority on this forum agree on something.
I said "No" to keep you out of trouble, but GoForSmoke is not wrong.
It is possible to avoid the hardware SPI bus for the RF24 (nRF24L01+) and use a software implementation that can be used on any pins. Someone has it working here.
But I'm afraid that is might cause new troubles and I don't like that Motor Shield anyway.
So if you really want to use both, then read this about using software SPI on other pins (you can use A0 ... A5): https://github.com/nRF24/RF24/blob/master/docs/arduino.md