gistfile1.aw

<?php
function hook_views_pre_render(&$view) {
  if ($view->name == 'ranges_by_room') {
    //we order the view by node_node_data_field_pim_offer_title
    //and we want the offer information only one time
    $preview_offer = FALSE;
    foreach ($view->result as $key => $value) {
      if ($preview_offer == $view->result[$key]->node_node_data_field_pim_offer_nid) {
        unset($view->result[$key]->node_node_data_field_pim_offer_node_data_field_pim_description_field_pim_description_value);
        unset($view->result[$key]->node_node_data_field_pim_offer_node_data_field_pim_image_field_pim_image_value);
      }
      else {
        $preview_offer = $view->result[$key]->node_node_data_field_pim_offer_nid;
      }
    }
  }
}