J'affiche les éléments du côté php comme ceci :

<?php foreach ($cases as $case) { ?>
    <div class="case">
        <div class="row">
            <div class="col-6">
                <img src="<?= $case->getImageUrl() ?>">
            </div>
            <div class="col-6">
                <div class="text"><?= $case->text ?></div>
            </div>
        </div>
    </div>
<?php } ?>

Sur la page html, ils ressemblent à ceci

.case {
  padding: 50px;
}

img {
  width: 300px;
}

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.3.0/css/bootstrap.min.css" integrity="sha512-t4GWSVZO1eC8BM339Xd7Uphw5s17a86tIZIj8qRxhnKub6WoyhnrxeCIMeAqBPgdZGlCcG2PrZjMc+Wr78+5Xg==" crossorigin="anonymous" referrerpolicy="no-referrer" />

<div class="case">
    <div class="row">
        <div class="col-6">
            <img src="https://i.imgur.com/JMHHMVl.jpg">
        </div>
        <div class="col-6">
            <div class="text">case 1</div>
        </div>
    </div>
</div>

<div class="case">
    <div class="row">
        <div class="col-6">
            <img src="https://i.imgur.com/m3cq9ez.jpg">
        </div>
        <div class="col-6">
            <div class="text">case 2</div>
        </div>
    </div>
</div>

<div class="case">
    <div class="row">
        <div class="col-6">
            <img src="https://i.imgur.com/IKXSAiw.jpg">
        </div>
        <div class="col-6">
            <div class="text">case 3</div>
        </div>
    </div>
</div>

Est-il possible d'échanger col-6 alternativement pour que les éléments de la page apparaissent en damier, comme ceci

.case {
  padding: 50px;
}

img {
  width: 300px;
}

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.3.0/css/bootstrap.min.css" integrity="sha512-t4GWSVZO1eC8BM339Xd7Uphw5s17a86tIZIj8qRxhnKub6WoyhnrxeCIMeAqBPgdZGlCcG2PrZjMc+Wr78+5Xg==" crossorigin="anonymous" referrerpolicy="no-referrer" />

<div class="case">
    <div class="row">
        <div class="col-6">
            <img src="https://i.imgur.com/JMHHMVl.jpg">
        </div>
        <div class="col-6">
            <div class="text">case 1</div>
        </div>
    </div>
</div>

<div class="case">
    <div class="row">
        <div class="col-6">
            <div class="text">case 2</div>
        </div>
        <div class="col-6">
            <img src="https://i.imgur.com/m3cq9ez.jpg">
        </div>
    </div>
</div>

<div class="case">
    <div class="row">
        <div class="col-6">
            <img src="https://i.imgur.com/IKXSAiw.jpg">
        </div>
        <div class="col-6">
            <div class="text">case 3</div>
        </div>
    </div>
</div>