<?php if( have_rows('blok') ): ?>
<?php while(the_flexible_field("blok")): ?>
<?php if(get_row_layout() == "opis_z_obrazkiem"): // layout: Content ?>
<div class="container">
</div><!--container-->
<?php elseif(get_row_layout() == "blok_2"): // layout: File ?>
<div class="container">
</div><!--container-->
<?php endif; ?>
<?php endwhile; //parent?>
<?php endif; //parent?>