Hi Alok,
I suppose you are in the iterator of a cellerator tag. It is kind of hard to get what you are doing from the post you made.
If I remember correctly, I did it with a DIV tag and adding styles. You seem to already have build an HTML bee around the original content.
<div style="background-color: green">
Of course you need to close the tag again </div>
You might have to add the DIV for every cell. As the BSP Tags add styles very often they get overwritten a lot.
cheers Carsten