<?php
$data = [1,2,3,4,5,6,7, 8];

echo "<div class='own-countersoul'>";
for($i = 0; $i < count($data); $i += 2) {

   echo "<div class='item'>";

	echo "<div class='single_item'>".$data[$i]."</div>";

	echo "<div class='single_item'>".$data[$i+1]."</div>";

   echo "</div>";

}
echo "</div>";

?>