Hello @kartik,
Instead of using HTML comments (which have no effect on PHP code -- which will still be executed), you should use PHP comments:
<?php /*
<tr>
<td><?php echo $entry_keyword; ?></td>
<td><input type="text" name="keyword" value="<?php echo $keyword; ?>" /></td>
</tr>
<tr>
<td><?php echo $entry_sort_order; ?></td>
<td><input name="sort_order" value="<?php echo $sort_order; ?>" size="1" /></td>
</tr>
*/ ?>
With that, the PHP code inside the HTML will not be executed; and nothing (not the HTML, not the PHP, not the result of its non-execution) will be displayed.
Hope it helps!!
Thank You!!