Custom formatter for a multi-valued field
here a sample for rendering (image) fields but you can easily access to other fields of entity:

$output = '';
foreach ($variables['#items'] as $item) {
  $output .= theme('file_link', array('file' =&gt; (object) $item));
}
return $output;


Another line example for manual image rendering:

$output .= '&lt;img typeof="foaf:Image" src="'.image_style_url('YOUR_IMAGE_STYLE', $your_entity-&gt;your_field['und'][0]['uri']).'" alt="'.$your_entity-&gt;your_field['und'][0]['alt'].'"/&gt;';