public function showMedia()
    {
        $mediaMapper = ($this->container->dataMapper)('MediaMapper');
        $mediaCategoryMapper = ($this->container->dataMapper)('MediaCategoryMapper');

        $data['media'] = $mediaMapper->find();
        $data['categories'] = $mediaCategoryMapper->findCategories();
        $cats = $mediaCategoryMapper->findAllMediaCategoryAssignments();

        // Assign any category ID's to each medium
        foreach ($data['media'] as $key => &$medium) {
            $medium->category = [];
            foreach ($cats as $cat) {
                if ($medium->id === $cat->media_id) {
                    $medium->category[$cat->category_id] = 'on';
                }
            }
        }

        return $this->render('media/media.html', $data);
    }