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I assume you are asking how to do this. The typical answer is to use bit mapping. Let us assume that your rf remtoe is transmitting bytes. Then you set up a transmission scheme where a command byte is followed by a data byte. You can optionally add a CRC or check byte to the end for greater noise immunity.
The command byte informs receiver as to what action to take. In your case, it is motor control. Then in the data byte, you assign bit 0 to be the state of the right wheel, for example. Bit 1 could be the state of the left wheel. The remaining bits can control other motors or functions.
Since this data byte is available at exactly the same time, all motors change their state at the same time. The limitation of this scheme is that it takes greater time to send and decode this datastream. However, for motors this is not a major drawback because the transmission data rate is much higher than the reaction time of the motors.
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