Alter content without losing the content

I'm having a problem trying to add some class to the node so i can change it's content.
For example i have the main menu, the i click into the page with the list of different nodes, but when i click on the node, the only parent class is node + number. I would like to assign a class to the node. Tried alter but i got blank page, tried postprocess but i cannot make it work.

This is my complete code:

/**
 * Implements hook_menu().
 */
function auditorias_menu() {
  var items = {};
  items['auditorias_en_video'] = {
    title: 'Auditorías en video',
    page_callback: 'auditorias_auditorias_en_video_page'
  };
  return items;
}
/**
 * The page callback to display the view.
 */
function auditorias_auditorias_en_video_page() {
  try {
    var content = {};
    content['auditorias_en_video'] = {
      theme: 'view',
      pager_pos: 'bottom',
      format: 'ul',
      path: 'drupalgap/auditorias-en-video', /* the path to the view in Drupal */
      row_callback: 'auditorias_auditorias_en_video_row',
      empty_callback: 'auditorias_auditorias_en_video_empty',
      attributes: {
        id: 'auditorias_en_video_view'
      }
    };
    return content;
  }
  catch (error) { console.log('auditorias_auditorias_en_video_page - ' + error); }
}

function auditorias_auditorias_en_video_row(view, row) {
  try {
    return l(row.title, 'node/' + row.nid);
  }
  catch (error) { console.log('auditorias_auditorias_en_video_row - ' + error); }
}


/**
 *
 */
function auditorias_auditorias_en_video_empty(view) {
  try {
    return 'No se encontraron Artículos de auditorias_en_video.';
  }
  catch (error) { console.log('auditorias_auditorias_en_video_empty - ' + error); }
}

function auditorias_services_postprocess(options, result) {
  try {
    $("p").has("iframe").prependTo(".body");
  }
  catch (error) { console.log('auditorias_services_postprocess - ' + error); }
}

Thanks in advance!