Forum list in sidebar block

[LifesGreatestGift]

How would I go about getting the forum list (all forums viewable by current user) in a <select><option value="$forumid">$forumname</option></select> format?

I tried the following code

PHP Code:

function construct_forum_list($parentid = -1, &$ret, $permission = '')
{
    global $vbulletin;
    global $stylevar, $vbphrase, $defaultselected;
    if (!($vbulletin->userinfo['permissions']['forumpermissions']))
    {
        return;
    }
    if (empty($vbulletin->iforumcache))
    {
        require_once(DIR . '/includes/functions_forumlist.php');
        cache_ordered_forums(1, 1);
    }
    if (empty($vbulletin->iforumcache["$parentid"]) OR !is_array($vbulletin->iforumcache["$parentid"]))
    {
        return;
    }

    $ret.= "<select>";
    foreach($vbulletin->iforumcache["$parentid"] AS $forumid)
    {
        $forumperms = $vbulletin->userinfo['forumpermissions']["$forumid"];
        if ((!($vbulletin->options['showprivateforums']) OR !($vbulletin->forumcache["$forumid"]['options'] OR !$vbulletin->forumcache["$forumid"]['displayorder'] OR !($vbulletin->forumcache["$forumid"]['options']))
        {
            continue;
        }
        else
        {
            $forum = $vbulletin->forumcache["$forumid"];
            $ret.= "<option value=" . $forumid . ">";
            $ret.= $forum[title_clean];
            construct_forum_list($forumid, $ret, $forumperms);
            $ret.= "</option>";
        } // if can view
    } // end foreach ($vbulletin->iforumcache[$parentid] AS $forumid)
    $ret .= "</select>";
    return $ret;

} 


But I get the error

Fatal error: Cannot redeclare construct_forum_list() (previously declared in /home/krypto/public_html/forum/includes/block/html.php(95) : eval()'d code:1) in /home/krypto/public_html/forum/includes/block/html.php(95) : eval()'d code on line 39

Its a PHP block. Am I able to combine PHP/HTML?
How do I properly show a forum list dropdown selection?

I got some of the code from https://vborg.vbsupport.ru/showthread.php?t=246670 and removed the mod-specific conditionals on the fly so hopefully I didn't miss a ( or )

--------------- Added [DATE]1334036584[/DATE] at [TIME]1334036584[/TIME] ---------------

Ok, so I got rid of the error. Now my dropdown isn't showing all forums I am (as a user) able to post to. It may have something to do with the "-1"s?

--------------- Added [DATE]1334038241[/DATE] at [TIME]1334038241[/TIME] ---------------

nvm.