This is how you can do it:
$result = mysql_query(/* Your query */);
while($row = mysql_fetch_assoc($result)){
// do whatever here...
}
// set the pointer back to the beginning
mysql_data_seek($result, 0);
while($row = mysql_fetch_assoc($result)){
// do whatever here...
}
However, I would have to say, this doesn’t seem the right way to handle this. Why not do the processing within the first loop?