bid/module/Listings/view/listings/browse/listings.phtml

<?php
/**
 * @version 7.10 [rev.7.10.01]
 */
/** @var \Ppb\Db\Table\Rowset\Listings $listings */
/** @var string $class */
/** @var bool $carousel */
if (count($listings) > 0) {
    $carouselId = 'carousel' . ucfirst($params['type']);
    $nbListings = count($listings);

    $counter = 0;
    $active = 'active';
    ?>
    <div id="<?php echo $carouselId; ?>" class="carousel slide">
        <div class="carousel-inner">
            <?php foreach ($listings as $listing) { ?>
                <?php if ($carousel && (($counter % 4) == 0)) { ?>
                    <div class="item <?php echo $active; ?>">
                    <?php $active = null; ?>
                <?php } ?>
                <?php
                echo $this->partial('partials/listing-box.phtml', array(
                    'listing'  => $listing,
                    'class'    => $class,
                )); ?>
                <?php if ($carousel && ((++$counter % 4) == 0 || $counter >= $nbListings)) { ?>
                    </div>
                <?php } ?>
            <?php } ?>
        </div>

        <?php if ($carousel) { ?>
            <a class="left carousel-control" href="#<?php echo $carouselId; ?>" data-slide="prev">
                <span class="glyphicon glyphicon-chevron-left"></span>
            </a>
            <a class="right carousel-control" href="#<?php echo $carouselId; ?>" data-slide="next">
                <span class="glyphicon glyphicon-chevron-right"></span>
            </a>


        <?php } ?>
    </div>
<?php } ?>