links outside cakephp root directory

hi guys,... 

how can I link outside cakephp root directory,... 

I have a link that I want to take to another URL ($dba['Dba']['url'] sets in DB table): 

<?php echo $html->link($dba['Dba']['name'], $dba['Dba']['url']) ?> 

but source show <a href="dbas/http://some_url_from_table.... (with root: dbas...) 

and I want it to be <a href="http://some_url_from_table.... 

thanks in advance 

chris

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