@yeni2021 buyur bro

<?php

$urunadet = $adeti;

for ($say = 0; $say < $urunadet; $say++) {

    $renksor = $db->prepare("SELECT * FROM urun_ozellikleri WHERE ozellik_tip='renk' and urun_id=:urun_id");
    $renksor->execute(array(
        'urun_id' => $uruncek['urun_id']

    ));

    $renkkontrol = $renksor->rowCount();

    if ($renkkontrol > 0) {

        ?>

        <div class="form-group col-xs-4 pl-0">
            <label>Renk</label>
            <select class="form-control" name="urun_renk[]">
                <?php
                while ($renkcek = $renksor->fetch(PDO::FETCH_ASSOC)) {
                    ?>
                    <option value="<?php echo $renkcek['ozellik'] ?>"><?php echo $renkcek['ozellik'] ?></option>
                <?php } ?>
            </select>
        </div>

<?php } } ?>