<?php
    $images = get_field('slider_portfolio');
    $divider = 2;

    if( $images ): ?>

      <div id="mini-carousel2" class="carousel slide" data-ride="carousel">
        <div class="carousel-inner" style="max-height: 250px;min-height: 250px">
            <div class="carousel-item active">
                <div class="row">
            <?php
                $total = count( $images );
                $counter = 0;
                foreach( $images as $image ):
                    $counter++; ?>

                    <div class="col-md-6 col-sm-12 col-xs-12">
                <a href="<?php echo $image['sizes']['large']; ?>" class="fancybox img-<?php echo $counter; ?>" rel="mini" data-toggle="lightbox" data-gallery="portfolio-gallery">
                    <img class="img-fluid" src="<?php echo $image['sizes']['large']; ?>" alt="<?php echo $image['title']; ?>" />
                </a>
                </div>
                <?php $current_position = $images->$image + 1;

                    if (/* $image < $image->$total && */ $counter % $divider == 0) : ?>
                        </div>
                    </div>
                        <div class="carousel-item">
                              <div class="row">
                <?php endif; ?>
            <?php endforeach; ?>
        </div>
            </div>
        </div>

        <!-- Controls -->