to display data from an xml check out these resources
http://www.w3schools.com/PHP/php_xml_simplexml.asp
http://php.net/manual/en/book.xml.php
here is some sample code I use to display text (used on http://photo.danieltulp.nl )
<?php
$newsitems = new SimpleXMLElement('xmlfilename.xml', null, true);
foreach ($newsitems as $item):?>
<div class="newsitem">
<h4><?php echo $item->title?><span class="date"><?php echo $item->date?></span></h4>
<p><?php echo $item->body?></p>
</div>
<?php
endforeach;?>
if you want a button to go the next record, you could use:
<?php
$records = new SimpleXMLElement('records.xml', null, true);
$i = 0;
foreach ($records as $record):?>
<div class="record-<?php echo $i;?>" style="display:none;">
<p>Name: <?php echo $record->name?>
Age: <?php echo $record->age?>
Mark: <?php echo $record->mark?></p>
</div>
$i = $i + 1;
<?php endforeach;?>
and then use javascript to set the display property to block or inline
