Transform 'user_data' to array.

[eluser]pisio[/eluser]
Hi, again , it's me :p
How I can transform data from 'user_data' by ci_sessions table (table with data from session) to array ....

ci_sessions.user_data

a:3:{s:8:"username";s:4:"root";s:9:"logged_in";s:1:"1";s:4:"time";s:10:"1281412161";}

to
array (
'username' => 'root',
'logged_in' => '1',
'time' => '1281412161'
and more if there exist
);


Sorry for my bad English.
And 10x