// Note: This function is EXPERIMENTAL and may change in future 
function getPrevAndNextRecords($options) { 
 
  // error checking 
  if (!@$options['tableName']) { $errors .= "No 'tableName' value specified in options!<br/>\n"; } 
  if (!@$options['recordNum']) { $errors .= "No 'recordNum' value specified in options!<br/>\n"; } 
 
  // load ALL records matching 
  list($records, $metaData) = getRecords(array( 
    'tableName'   => $options['tableName'], 
  )); 
 
  // get prev and next records 
  $prevRecord = array(); 
  $nextRecord = array(); 
  $foundRecordNum = false; 
  foreach ($records as $record) { 
 
    // set next record 
    if ($foundRecordNum) { $nextRecord = $record; break; } 
 
    // set prev record 
    if ($record['num'] == $options['recordNum']) { $foundRecordNum = true; } 
    if ($foundRecordNum) { $prevRecord = @$lastRecordSeen; } 
    $lastRecordSeen = $record; 
  } 
 
  return array($prevRecord, $nextRecord); 
}

list($prevRecord, $nextRecord) = getPrevAndNextRecords(array( 
  'tableName' => 'news', 
  'recordNum' => getNumberFromEndOfUrl(), 
));

<?php if (@$prevRecord): ?> 
  <a href="<?php echo $prevRecord['_link'] ?>"> &lt;&lt; <?php echo $prevRecord['title'] ?></a> 
<?php endif; ?> 
 
<?php if (@$nextRecord): ?> 
  <a href="<?php echo $nextRecord['_link'] ?>"><?php echo $nextRecord['title'] ?> &gt;&gt;</a> 
<?php endif; ?>