<input name="col_extra[<?php echo $columnNumber;?>]"
       id="field_<?php echo $columnNumber; ?>_<?php echo ($ci - $ci_offset); ?>"
       <?php if (! empty($columnMeta['Extra']) && $columnMeta['Extra'] == 'auto_increment'): ?>
           checked="checked"
       <?php endif; ?>
       type="checkbox"
       value="auto_increment" />