offers:
id   |   rid   |    name
------------------------------
1    |  1234   |    mary
2    |  1235   |    john
3    |  5342   |    liam

geo_in_off:
offer_id   |   geo_id
------------------------------
1       |  1
2       |  2
3       |  3

No  |  rid  | name  | geo
----------------------------------
1   | 1234  | mary  | 1, 2

No  |  rid  | name  | geo
----------------------------------
1   | 1234  | mary  | 1
2   | 1234  | mary  | 2

require('../config.php');
$sql ="SELECT * FROM `offers` LEFT JOIN `geo_in_off` ON `geo_in_off`.`offer_id` = `offers`.`id` ORDER BY `offers`.`rid`";
$result = mysql_query($sql) or die(mysql_error());

while ($row=mysql_fetch_assoc($result)) {
echo "<tr><td>" . $i . "</td><td class="editable">" . $row['rid'] . "</td><td class="editable">" . $row['name'] . "</td><td>" .$row['geo_id'] . "</td></tr>"  ;
$i++;
}