Bei leeren Datenfeld div Element ausblenden

.btn { display:block; }

<?php
$sql = "SELECT gutschein_code1, gutschein_code2, code_aktiv, userid, gutschein_code_vorname, gutschein_code_nachname, gedruckt, verschickt, gutschein_code_einrichtung, gutschein_code_ort
                        FROM bewerbungsgutscheincode
                        WHERE code_aktiv = 0 ORDER BY gutschein_code_nachname ASC";
                        echo '
                        <table class="table table-hover">
                            <thead style="background-color:#DCDCDC;">
                                <td>Gutschein-Code</td>
                                <td>Für</td>
                                <td>&nbsp;</td>
                                <td style="text-align:center;">Drucken</td>
                                <td style="text-align:center;">Versenden</td>
                                <td style="text-align:center;">Löschen</td>
                            </thead>
                            ';
                          
                            foreach ($pdo->query($sql) as $row) {
                            echo '<tbody>
                                <td>'.$row['gutschein_code1']. '' .$row['gutschein_code2'].'</td>
                                <td>'.$row['gutschein_code_vorname']. '' .$row['gutschein_code_einrichtung'].'</td>
                                <td>'.$row['gutschein_code_nachname']. '' .$row['gutschein_code_ort'].'</td>
                                <td style="text-align:center;">
                                    <form action="gutschein_code_drucken.php" method="GET">
                                        <input name="gutschein_code1" type="hidden" value="'.$row['gutschein_code1'].'" />
                                        <input name="gutschein_code1" type="hidden" value="'.$row['gutschein_code1'].'" />
                                        <div class="btn">
                                        <Button type="submit" class="btn btn-success btn-xs"><span class="glyphicon glyphicon-print"> '.$row['gedruckt'].'</span></button>
                                        </div>
                                    </form>
                                </td>
                                <td style="text-align:center;">
                                    <form action="gutschein_code_versenden.php" method="GET">
                                        <input name="gutschein_code1" type="hidden" value="'.$row['gutschein_code1'].'" />
                                        <div class="btn">
                                        <Button type="submit" class="btn btn-info btn-xs" style="display:block;"><span class="glyphicon glyphicon-envelope"> '.$row['verschickt'].'</span></button>
                                        </div>
                                    </form>
                                </td>
                                <td style="text-align:center;">
                                    <form action="#" method="POST">
                                        <input name="gutschein_code1" type="hidden" value="'.$row['gutschein_code1'].'" />
                                        <input name="gutschein_code2" type="hidden" value="'.$row['gutschein_code2'].'" />
                                        <Button type="submit" class="btn btn-danger btn-xs"><span class="glyphicon glyphicon-trash"></span></button>
                                    </form>
                                </td>
                            </tbody>';
                            }
                        echo '</table>';
                    ?>

<button style="display: '.(($row['gedruckt'] === 'gedruckt') ? 'none' : 'block').'">Inhalt</button>

echo 'style="display: '.(($row['gutschein_code_nachname'] === ' ') ? 'none' : 'block').'"

echo '<div style="display: '.(($row['userid'] === $userid) ? 'block' : 'none').'" >';