Сергей

$k = 1;
foreach ($news as $new) {
if ($k === 3) {
} else if ($k === 4) {
} else {}
$k++;
}

$array = [
"response" => [
"count" => 16,
"items" =>  [
[
 "id"=>"1",
        "is_dir"=> "true"    
],
[
 "id"=>"2",
        "is_dir"=> "false"    
]] ]]

<div class="item" id="<?=$this->GetEditAreaId($arItem['ID']);?>" style="width:<?=floor(100/intval($arParams["COLS_NUMBER"]));?>%;">

<div class="item col-md-<?=$arParams["COLS_NUMBER"]?>"