PHP - Array Format

Is their a way to format lr.submit_time in every record that is returned in the $results array without doing like a for/foreach loop? Like array_walk() or something similar?

$query = "
				SELECT
					lr.*,
					l.make,
					l.model,
					l.part_number,
					l.description,
					pd.job_number,
					pd.line_item,
					pd.enterprise,
					pd.description,
					pd.qty AS order_qty,
					log.name AS user_full_name
				FROM
					leds_requests lr
				LEFT JOIN
					leds l
				ON
					l.id = lr.product_id
				LEFT JOIN
					production_data pd
				ON
					pd.id = lr.order_id
				LEFT JOIN
					login log
				ON
					log.user_id = lr.user_id
				WHERE
					lr.id IN(
					SELECT
						MAX(id)
					FROM
						leds_requests
					WHERE
						status_id = 0
					GROUP BY
						order_id,
						product_id
				) AND lr.id NOT IN(
					SELECT
						id
					FROM
						leds_requests
					WHERE
						lr.id = id AND status_id IN(1, 2, 3, 4)
				)
				GROUP BY
					order_id,
					product_id,
					job_number
	";
	$statement = $pdo->prepare($query);
	$statement->execute();
	$results = $statement->fetchAll();
	
	echo json_encode($results);

I'm currently looping on an array with this structu

    Categories{
        CategoryName
        CategoryCode
        CategoryDescription

        Products{
            product_info{
                product_code
                product_type{
                    CountNumber
                    ProductDescription
                }
            }
            prices{
            "wholesale":"250",
            "retail":"400"
            }
        }    
    }

I'm looping on the above array at each level, and I've declared an array so that I can put all my needed values into it

    $priceResult = array();

    foreach($prices->categories as $category){ 
        $categoryName = $category->category_name;
        $categoryCode = $category->category_code;
        $categoryDescription = $category->category_desc;

        foreach($category->products as $product){

            foreach($product->product_info as $info){
                $product_code = $info->product_code;
                foreach($info->product_type as $type){
                    $CountNumber = $type->CountNumber;
                    $ProductDescription = $type->ProductDescription;
                }
            }
            foreach ($product->prices as $price => $amount) {
                $price_amount = $amount;
                
            }
        }
    }

The problem I'm having is I don't know how to properly push into that new ```$priceResult``` array so that I can use PHPExcel to put it into a format with a subheader.

The format I would want from the above example would be something like this

        Test Category 1  |  123  |   Category for Testing
        ==================================================
        PRD123 |  12  |  Product for Testing  |  150.00
        PRD112 |  17  |  Product for Testing  |  250.00

        Test Category 2  |  321  |   New Category for Testing
        =====================================================
        PRD189 |  16  |  Product for Testing  |  450.00
        PRD139 |  34  |  Product for Testing  |  350.00

So basically I want to call PHPExcel on my $priceResult array in order to get that format where I can list my category info, and for each product within that category, I'd have a product row. Everything would be grouped by the category main header

        $build = Excel::create($name, function ($excel) use ($priceResult) {

        $excel->setTitle('Test Products');

UPDATE:

SO I'm thinking my desired resulting array would be something like:

    CategoryCode : 123
    CategoryName : TestCategory
    CategoryDescription: For Testing
        Products{
            0{
                Product_code : 123,
                CountNumber : 12,
                ProductDescription: Test Product,
                price_amount : 150.00
            },
            1{
                Product_code : 112,
                CountNumber : 32,
                ProductDescription: Test Product 2,
                price_amount : 250.00
            }
        }

    
That way each category can be a header and all of its products can be rows for each category