Changing the labels on a combobox filter

    {
      "MIGX_id":2,
      "name":"published",
      "label":"Published",
      "emptytext":"Published",
      "type":"combobox",
      "getlistwhere":{
        "published":"[[+published]]"
      },
      "getcomboprocessor":"getcombo",
      "combotextfield":"published",
      "comboidfield":"",
      "comboparent":"",
      "default":""
    }

<?php

$config = $modx->migx->customconfigs;
$emtpytext = $config['gridfilters'][$scriptProperties['searchname']]['emptytext'];
$emtpytext = empty($emtpytext) ? 'all' : $emtpytext;
$options = array();
$options[] = array('combo_name' => $emtpytext, 'combo_id' => 'all');
$options[] = array('combo_name' => 'published', 'combo_id' => '1');
$options[] = array('combo_name' => 'unpublished', 'combo_id' => '0');

$count = count($options);
return $this->outputArray($options, $count);

{
  "MIGX_id":2,
  "name":"published",
  "label":"Published",
  "emptytext":"Filter by Published",
  "type":"combobox",
  "getlistwhere":{
    "published":"[[+published]]"
  },
  "getcomboprocessor":"getpublishedcombo",
  "combotextfield":"",
  "comboidfield":"",
  "comboparent":"",
  "default":""
}

<?php

//if (!$modx->hasPermission('quip.thread_list')) return $modx->error->failure($modx->lexicon('access_denied'));

$config = $modx->migx->customconfigs;

$textfield = $config['gridfilters'][$scriptProperties['searchname']]['combotextfield'];
$idfield = $config['gridfilters'][$scriptProperties['searchname']]['comboidfield'];
$idfield = empty($idfield) ? $textfield : $idfield;

$prefix = isset($config['prefix']) && !empty($config['prefix']) ? $config['prefix'] : null;
if (isset($config['use_custom_prefix']) && !empty($config['use_custom_prefix'])) {
    $prefix = isset($config['prefix']) ? $config['prefix'] : '';
}

if (!empty($config['packageName'])) {
    $packageNames = explode(',', $config['packageName']);

    if (count($packageNames) == '1') {
        //for now connecting also to foreign databases, only with one package by default possible
        $xpdo = $modx->migx->getXpdoInstanceAndAddPackage($config);
    } else {
        //all packages must have the same prefix for now!
        foreach ($packageNames as $packageName) {
            $packagepath = $modx->getOption('core_path') . 'components/' . $packageName . '/';
            $modelpath = $packagepath . 'model/';
            if (is_dir($modelpath)) {
                $modx->addPackage($packageName, $modelpath, $prefix);
            }

        }
        $xpdo = &$modx;
    }
} else {
    $xpdo = &$modx;
}

$classname = 'modCategory';

$sort = $modx->getOption('sort', $scriptProperties, $textfield);
$dir = $modx->getOption('dir', $scriptProperties, 'ASC');

$c = $xpdo->newQuery($classname);
//$count = $modx->getCount($classname,$c);
$c->select($classname . '.id, ' . $idfield . ' as combo_id, ' . $textfield . ' as combo_name');

$c->sortby($sort, $dir);
$stmt = $c->prepare();
//echo $c->toSql();
$stmt->execute();
$rows = $stmt->fetchAll();

$count = count($rows);

$emtpytext = $config['gridfilters'][$scriptProperties['searchname']]['emptytext'];
$emtpytext = empty($emtpytext) ? 'all' : $emtpytext;

$rows = array_merge(array(array('combo_id' => 'all', 'combo_name' => $emtpytext)), $rows);

return $this->outputArray($rows, $count);

{
  "MIGX_id":2,
  "name":"category",
  "label":"category",
  "emptytext":"Select Category",
  "type":"combobox",
  "getlistwhere":{
    "category":"[[+category]]"
  },
  "getcomboprocessor":"getcategoriescombo",
  "combotextfield":"category",
  "comboidfield":"id",
  "comboparent":"",
  "default":""
}