how to remove white space in select 2

php jquery ajax

PHP Snippet 1:

$imei = $row["IMEI_MX"];
$imeiserial = explode(',', $imei);

echo '<select id="tags" name="imei" disabled class="form-control" onchange="getCount()" multiple>';

foreach($imeiserial as $is){
    $wew = trim($is);

    if (!empty($wew)) {
        echo "<option value='$wew'>$wew</option>";
    }
}
echo '</select>';

PHP Snippet 2:

<option value='867637026628082, 867637026628090'>867637026628082</option>

PHP Snippet 3:

<option value='867637026628082'>867637026628082</option>