Classes usage example

<?php

/**
 * Class Master
 * @property integer id
 * @property string name
 * @property string city;
 * @property bool delivery
 * @property array services
 */
class Master
{
    private $id;
    private $name;
    private $city;
    private $delivery = false;
    private $services = [];

    public function __construct(int $id, string $name, string $city, bool $delivery = false)
    {
        $this->id = $id;
        $this->name = $name;
        $this->city = $city;
        $this->delivery = $delivery;
    }

    public function getId(): int
    {
        return $this->id;
    }

    public function setServices(array $services = [])
    {
        $this->services = $services;
    }

    public function getServices(): array
    {
        return $this->services;
    }

    public function formatServices(): array
    {
        return array_map(function ($service) {
            return \sprintf(
                '%s - %s - %d',
                $service['title'],
                $this->name,
                $service['price']
            );
        }, $this->getServices());
    }
}

$equalsRow = str_repeat('=', 10);

$masters = [
    new Master(2, 'Nick', 'Moscow', true),
    new Master(10, 'Cheburashka', 'Chelyabinsk', false),
];

$services = [
    ['master_id' => 2, 'title' => 'Concrete', 'price' => 200],
    ['master_id' => 2, 'title' => 'Tile', 'price' => 80],
    ['master_id' => 10, 'title' => 'Square', 'price' => 799],
];

array_map(function (Master $master) use ($services) {
    $master->setServices(
        array_filter(
            $services,
            function ($service) use ($master) {
                return $service['master_id'] === $master->getId();
            }
        )
    );
}, $masters);

echo \sprintf('%s %s %s' . PHP_EOL, $equalsRow, 'Товары', $equalsRow);

array_map(function (Master $master) {
    array_map(function ($service) {
        echo \sprintf("%s" . PHP_EOL, $service);
    }, $master->formatServices());
}, $masters);