<?php
$args = array(
  'post_type' => 'speelt',
  'posts_per_page' => -1,
);
$loop = new WP_Query( $args );
if ( $loop->have_posts() ): ?>
<div class="container">
  <div class="row">

    <?php while ( $loop->have_posts() ) : $loop->the_post(); ?>
      <div class="col-md-6">
        <?php get_template_part( 'templates/content', get_post_type() ); ?>
      </div>
    <?php endwhile; ?>
  </div>
</div>
<?php endif; wp_reset_postdata(); ?>