Виталий Фролов

const items = document.querySelectorAll(".our-products_item");
for (let i = 0; i < items.length; i++) {
  items[i].querySelector('.open').addEventListener("click", function(){btnClick(i)});
  items[i].querySelector('.сlosed').addEventListener("click", function(){btnClick(i)});
}
function btnClick(item) {
  items[item].querySelector('.over-product').classList.toggle("hidden");
}

<?php if( get_field('enable_sidebar') ): ?>
	
	<?php // do something ?>
	
<?php endif; ?>

<div class="promoheaderz">
  <div class='container'>
	<?php while ( have_rows('headerblock') ) : the_row(); ?>
      <div class="row" style="background-image: url(<?php echo get_sub_field('background_header')['url']; ?>);">
        <div class='discount_text dis col-md-4'>
          <?php the_sub_field('Text_left'); ?>
        </div>
        <div class='discount_img col-md-4'>
          <?php $img = get_sub_field('Product_image'); ?>
          <img src="<?php echo $img['url']; ?>" alt="<?php echo $img['alt']; ?>">
        </div>
        <div class='discount_text col-md-4 model'>
            <?php the_sub_field('Text_right'); ?>
        </div>
      </div>
	<?php endwhile; ?>
  </div>
</div>

$true_title = get_field('titleh1') ? get_field('titleh1') : get_the_title( $post );
$str .= '<div class="single-style2-title"><h1>' . $true_title . '</h1></div>';