matdel

Below is the full code pasted in, I’m not following a 100% what you mean as I’m not a PHP developer..

<?php get_header(); the_post (); ?>

	<!-- CONTENT -->
	<div id="maincontent" class="clearfix">
		<div class="wrapper">
			<div class="breadcrumbs">
				<?php if ( function_exists('yoast_breadcrumb') ) {
				yoast_breadcrumb('<p id="breadcrumbs">','</p>');
				} ?>
			</div>
			<div id="content-left">
				<?php $this_page_id=$wp_query->post->ID; ?>
				<?php query_posts(array('showposts' => 4, 'orderby' => 'menu_order', 'order' => 'ASC', 'post_parent' => $this_page_id, 'post_type' => 'page')); while (have_posts()) { the_post(); ?>
	                <?php if ( get_post_meta($post->ID, "post-img", true) ) { ?>
	                <?php } else { ?>
						<div class="dienst">
							<?php the_post_thumbnail(); ?>
							<h2><?php the_title(); ?></h2>
							<p><?php the_field('dienst-beschrijving'); ?></p>
						</div>
                <?php } ?>
				<?php } ?>
				<?php wp_reset_query(); ?>
			</div>
			<div id="widget">
				<?php the_content(); ?>
			</div>
		</div>
	</div>
	<div class="push"></div>
</div>
<!-- /CONTENT -->

<?php get_footer(); ?>

Would you suggest a different approach?