Sending parsed bits on STM32

Suppose the ILI9320 TFT LSB & MSB pins are connected to Port B & Port C respectively. In that case the code will be :-

GPIOB->ODR=((GPIOB->ODR&0x00ff)|(data<<8));
GPIOC->ODR=((GPIOC->ODR&0xff00)|(data>>8));

Suppose in case of different connection like :-

PD14 - DB0, PD15 - DB1, PD0 - DB2, PD1 - DB3, PE7 - DB4, PE8 - DB5,
PE9 - DB6, PE10 - DB7, PE11 - DB8, PE12 - DB9, PE13 - DB10, PE14 - DB11,
PE15 - DB12, PD8 - DB13, PD9 - DB14, PD10 - DB15

In such case how the above coded statements has to be modified ?

There is no right to way to handle such hardware interfacing. You need to write your own glue logic to handle data bits and fit them in right place on the port pins. Best way could be to map data bit vs pin position array and run a loop on the data bit. so even if there is change in the design you just need to update the pin<->data mapping.