<select id="teamlist" onchange= "SBtoTB()" name="teamlist">
<?php

                $pdo = new PDO('mysql:host=localhost;dbname=clubresults', 'root', '12345678');
    #Set Error Mode to ERRMODE_EXCEPTION.
    $pdo->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);



$stmt = $pdo->prepare('Select teamname, member_id from members');
$stmt->execute();

   while($row = $stmt->fetch(PDO::FETCH_ASSOC)) {

echo "<option value=\"" . $row['member_id'] . "\">".$row['teamname']."</option>";
 }
 ?>
</select>