You could always check out http://www.w3schools.com/php/php_ref_date.asp or http://php.net/manual/en/ref.datetime.php for php date functions.
Edit: Date() could be what you want
echo date('d/m/Y',mktime(0,0,0,6,20,2007)); // displays 20/6/2007
echo date('d/m/Y'); //displays todays date 11/6/2007
You could do something like this
$row=mysql_fetch_assoc(mysql_query("SELECT * FROM something WHERE id=1"));
//presume date format YYYY-MM-DD
//either this way
$year=substr($row['date'],0,4);
$month=substr($row['date'],5,2);
$day=substr($row['date'],8,2);
echo date('d/m/Y',mktime(0,0,0,$month,$day,$year));
// or
echo date('d/m/Y',mktime(0,0,0,substr($row['date'],5,2),substr($row['date'],8,2)y,substr($row['date'],0,4));