yep this does it. this code will blink leds connected to pins 5 and 6 on the board. Thanks all for your help and pointing me in the right direction. But i feel it would be great if Arduino itself could give support to access a port as a whole atleast if not in the due in the other arduino's as well so that we can easily output a byte or a nibble of data in parallel where required (correct me if i'm wrong assuming there is no support for such fucntioniality in arduino yet).
void setup()
{ REG_PIOC_OER=0x03000000;
REG_PIOC_OWER=0x03000000;
}
void loop()
{
REG_PIOC_ODSR=0x03000000;
delay(2000);
REG_PIOC_ODSR=0x00000000;
delay(2000);
}