I want circuit diagram for controlling the Dc motors with remote control. Range of control can be about 5meters.
You must realize, this is a hobby robotics site, not a hobby electronics site. If you want a schematic for a remote control then you should be looking at hobby electronic sites.
Get a controller board like this one here: http://www.hobbyking.com/hobbyking/store/__21977__HobbyKing_Multi_Rotor_Control_Board_V3_0_Atmega328_PA_.html
Get an 4+ channel receiver here: http://www.hobbyking.com/hobbyking/store/__295__190__Tx_Rx_Systems_Parts-2_4Ghz_HobbyKing.html (don't forget to get a compatible remote)
Get your ESCs here (you need 4 for a quad rotor copter): http://www.hobbyking.com/hobbyking/store/__4318__TURNIGY_Plush_6A_8bec_6g_Speed_Controller.html
You now have a remote control system for your quad copter.
If you already have a control board and ESCs, all you need is the 4+ channel receiver and a compatible remote. Plug the receiver to the control board and you're good to go.
The Atmega remote is going to cost you easily 4 or 5 times more than you can buy one for.
Take your Atmega, add an X-bee and a pot. Take a second Atmega, add a LCD screen and an X-bee.
Write code to transmit the values of the pot from one Atmega to the other and display them on the LCD.
If you can do this, you have pretty much built your remote already.
rather than getting it from a store, isn't there any ideas to make a wireless remote?
Yes there are tons of methods, CtC already gave you an idea on using X-Bee's to communicate. Take note though, depending on the distance you need and complexity of the controls, you might be looking at a lot more work and possibly the same amount of $$$ for a homemade version.
Maybe I'm missing something but, why not just get an R/C remote and receiver at a hobby store? The ones for helicopters and such are made specifically for this.
And this: http://www.hobbyking.com/hobbyking/store/__504__501__Multi_Rotors_Parts-Electronics.html