# for-Methode:
for($i = 1; $i <= $items; $i++) echo '<option>....';

# while-Methode:
$i = 1;
while($i <= $items) {
    $i++;
    echo '<option>....';
}

# do-Methode:
$i = 1;
do {
    $i++;
    echo '<option>....';
} while ($i <= $items);