Fatal error: Call to a member function advanced_render() on a non-object
I think you may have copied that code somewhat from a Drupal 6 version? The only problem is that the pattern for theme function signatures has changed in Drupal 7; only the $vars argument is passed in now, which is an array of named variables for the function:

function myTheme_views_view_field($vars) {
  $view = $vars['view'];
  $field = $vars['field'];
  $row = $vars['row'];

  // ...
}