Константин П

function slugify($text)
{
  // replace non letter or digits by -
  $text = preg_replace('~[^\\pL\d]+~u', '-', $text);

  // trim
  $text = trim($text, '-');

  // transliterate
  if (extension_loaded('intl')) {
    $translit = Transliterator::create('Any-Latin; Latin-ASCII');
    $text = $translit->transliterate($text);
  } else {
    $map = array(
        'а' => 'a',   'б' => 'b',   'в' => 'v',  'г' => 'g',  'д' => 'd',  'е' => 'e',  'ж' => 'zh', 'з' => 'z',
        'и' => 'i',   'й' => 'y',   'к' => 'k',  'л' => 'l',  'м' => 'm',  'н' => 'n',  'о' => 'o',  'п' => 'p',
        'р' => 'r',   'с' => 's',   'т' => 't',  'у' => 'u',  'ф' => 'f',  'х' => 'h',  'ц' => 'ts', 'ч' => 'ch',
        'ш' => 'sh',  'щ' => 'sht', 'ъ' => 'y',  'ы' => 'y',  'ь' => '\'', 'ю' => 'yu', 'я' => 'ya', 'А' => 'A',
        'Б' => 'B',   'В' => 'V',   'Г' => 'G',  'Д' => 'D',  'Е' => 'E',  'Ж' => 'Zh', 'З' => 'Z',  'И' => 'I',
        'Й' => 'Y',   'К' => 'K',   'Л' => 'L',  'М' => 'M',  'Н' => 'N',  'О' => 'O',  'П' => 'P',  'Р' => 'R',
        'С' => 'S',   'Т' => 'T',   'У' => 'U',  'Ф' => 'F',  'Х' => 'H',  'Ц' => 'Ts', 'Ч' => 'Ch', 'Ш' => 'Sh',
        'Щ' => 'Sht', 'Ъ' => 'Y',   'Ь' => '\'', 'Ю' => 'Yu', 'Я' => 'Ya'
    );
    $text = strtr($text, $map);
  }
  
  // lowercase
  $text = strtolower($text);

  // remove unwanted characters
  $text = preg_replace('~[^-\w]+~', '', $text);

  if (empty($text)) {
    $text = 'n-a';
  }

  return $text;
}

select price form prices where id in (select id ...)

<?php

function get_categoies($pdo)
{
    $stmt = $pdo->prepare("SELECT * FROM `categories`");
    $stmt->execute();
    return $stmt->fetchAll(PDO::FETCH_ASSOC);
}

function get_prices_by_category($pdo, $category_id)
{
    $stmt = $pdo->prepare("SELECT * FROM `prices` WHERE category_id = ?");
    $stmt->execute([$category_id]);
    return $stmt->fetchAll(PDO::FETCH_ASSOC);
}

$categories = get_categoies($pdo);

foreach ($categories as $category) {
	echo '<h3>'.$category['title'].'</h3>
  			<div class="cblock">';
	$prices = get_prices_by_category($pdo, $category['id']);
	foreach ($prices as $price) {
		echo '<div class="pricelist-row">
				<div class="service">' . $price["title"] . '</div>
				<div class="price">от ' . $price["price"] . ' руб/' . $price["type"] . '</div>
	  		</div>';
	}
	echo '</div>';
}

$(function() {
    $('#launch').on('click', function() {
        var $this = $(this);
        $this.addClass('go');
        setTimeout(function() {
             $this.removeClass('go');
        }, 1000);
    })
});