Wordpress custom image linking within <li> element

add_filter('get_image_tag', 'lanti_get_image_tag', 10/*prio*/, 6/*number of arguments*/);
function lanti_get_image_tag($html, $id, $alt, $title, $align, $size)
{
    $elotte = '<li>';
    $utana = '</li>';
    $html = $elotte . $html . $utana;
    return $html;
}