Someone

case 'search_block_form':      $project_type_tids = array(        '' => t('All'),        6 => t('6'),        7 => t('7'),        8 => t('8'),      );      $form['advanced'] = array('#weight' => -1);      $form['advanced']['category'] = array(        '#type' => 'select',        '#title' => t('Search in'),        '#options' => $project_type_tids,      );            $form['basic']['inline']['processed_keys'] = array('#type' => 'value', '#value' => array());              $form['#validate'] = array(        'bigideas_search_validate' => array(),        'node_search_validate' => array(),      );      $form['#submit'] = array(        'search_form_submit' => array(),      );      break;// ...function bigideas_search_validate($form_id, $form_values, $form) {  form_set_value($form['basic']['inline']['processed_keys'], trim($form_values['search_block_form_keys']));}