Smarty

[lidou]

hi,all.i am a newer to smarty.
i met trouble when i use pear db to assign to an array variable.
the following code segment is my program:

$t->assign('articleclass', $db->getAll('Select BigClassID,BigClassName from TDBigClass'));

<select name=articleprop>
{html_options values=$articleclass.BigClassID selected=$selclass output=$articleclass.BigClassName}
</select>

i want to assign html_options values with BigClassID,and output with BigClassName...
what should i do?
thanks.