It’s not exactly what I want. But I find out the solution :
<?php $field = get_field_object('equipement');
$equipements = $field['choices'];
$equipements_selected = $field['value'];
if (sizeof($equipements_selected)>0) {
?>
<ul>
<?php foreach($equipements_selected as $equipClass) {
$equipLabel = $equipements[$equipClass];
?>
<li class="<?php echo $equipClass; ?>"><?php echo $equipLabel; ?></li>
<?php } // foreach ?>
</ul>
<?php } // if sizeof ?>
Thank you for your answer.
