LittleFatNinja

public function mainSlider(){
    global $Data, $Page;
    $result = '';

    $mainSliderList = $Data->GetRows("SELECT c.*, p.v_s as price, b.v_s as mainSlider FROM `catalog` c 
      LEFT JOIN `info` b ON c.id=b.id 
      LEFT JOIN `info` p ON c.id=p.id AND p.key='price'
      WHERE b.key='mainSlider'
    ");

    foreach ($certificatesList as $certificate) {
      $result .= '
        <li>
          <a href="'.$certificate['image'].'" class="certificateFancy">
            <img src="/file/view2'.$certificate['image'].'/rc230,324_i.jpg">
          </a>
        </li>
      ';
    }

    return $result;
  }

.main .sidebar .active:hover {
  border-left: 0.3em solid #3498DB;
}