$result = mysql_query( "SELECT id, title, date, author, description FROM lessons", $db );
$myrow = mysql_fetch_array($result);

<?php
............................

$tok=strtok($myrow,",");
while ($tok !== false) 
{
  echo "<tr><td>$tok</td>";  
  $tok=strtok("\n\r");
  echo "<td>$tok</td></tr>\n"; 
  $tok=strtok(",");
}
?>