On line 621
echo '<td class="dataTableHeadingContent" align="right">' . TEXT_INFO_ID . '</td>' . '<td class="dataTableHeadingContent" align="left">' . '&nbsp;&nbsp;Categories Name' . '</td>';
uses hard-coded text.

Suggest change to
echo '<td class="dataTableHeadingContent" align="right">' . TEXT_INFO_ID . '</td>' . '<td class="dataTableHeadingContent" align="left">' . '&nbsp;&nbsp;' . TEXT_SORT_CATEGORIES_NAME . '</td>';