@sky,
That can be easily done with CSS.

For example:

<a href="" id="<?php echo $filehost; ?>" /><?php echo $filehost; ?></a>

Replace it according to the WCDDL code

Also you need to add CSS IDs in your .css file

Example:

#rapidshare.com{color:red;}
#mediafire.com(color:blue;}

and so on....