gistfile1.php

<?php
define('MYACTIVERECORD_CONNECTION_STR', 'mysql://yourDatabaseUserName:yourDatabasePassword@localhost/yourDatabaseName');
class Widgets extends MyActiveRecord {
  //nothing else needed here
}
$visible_columns = array();
$columns = MyActiveRecord::Columns('Widgets');
$out = '<table class="editable"><tr>'; //added the editable class
foreach($columns as $key => $column){
  if($key != 'id'){
    $out .= '<th id="' . $key . '">' . $key . '</th>'; //added column id
    $visible_columns[] = $key;
  }
}
$out .= '</tr>';
$widgets = MyActiveRecord::FindAll('Widgets');
foreach($widgets as $widget){
  $out .= "\n<tr id=\"row_" . $widget->id . "\">"; //added row id
  foreach($visible_columns as $col){
    $out .= '<td>' . $widget->h($col) . '</td>';
  }
  $out .= '</tr>';
}
$out .= '</table>';
?>

gistfile2.html

<script type="text/javascript">
TableKit.options.editAjaxURI = 'update.php';
</script>