[eh69]

Thank You very much! I didnt know that its simple!

But I have one problem.

when I set:

$find = 'Alfa Romeo 156';
$replace = '<a href="http://www.forum.alfaholicy.org/156/">Alfa Romeo 156</a>';
$post['message'] = str_ireplace ($find, $replace, $post['message']);

$find = 'Alfa 156';
$replace = '<a href="http://www.forum.alfaholicy.org/156/">Alfa 156</a>';
$post['message'] = str_ireplace ($find, $replace, $post['message']);

$find = '156';
$replace = '<a href="http://www.forum.alfaholicy.org/156/">156</a>';
$post['message'] = str_ireplace ($find, $replace, $post['message']);

Then Alfa 156 and Alfa Romeo 156 dont showing corectly (because in one phrase I have 2 links)

I can fix it with simple IF php function?

EDIT
And how fix it:

I have 2 replace for Alfa Romeo's models:
Alfa Romeo GT
Alfa Romeo GTV

And this script replace only 'Alfa Romeo GT' in phrase 'Alfa Romeo GTV' too