Как алертнуть форму Views Exposed Filters (BEF)

Решение:

<?php
 function MODULENAME_views_pre_view(&$view, &$display_id, &$args) {
  if ($view->name == 'VIEWSNAME') {
       $filters = $view->display_handler->get_option('filters');   
    $view->display_handler->override_option('filters', $filters);
  }
}

function MODULENAME_views_pre_build($view) {
  if ($view->name=='VIEWSNAME') {   
    $view->display['page']->handler->handlers['filter']['FIELD_FILTER_NAME']->value['value'] = 'VALUE';
    return $view;
  }    
}