Config Handler inserting erroneous quote

I'm updating my recent links module to allow editing of the links. The links are all in one textarea, one per line, url and text separated by , The code i'm using to run it looks like http://ideone.com/IhWlb - the array printed at the end is what is passed to $config->set("recent_links",$links) The config handler is then putting a quote at the start of each text item like below, i can't work out why. It's also only putting the first link under recent_links - the rest end up in separate sections

recent_links:
  0:
    url: "http://twitter.com/ChrisTaylor_TF/statuses/153423521844953088"
    text: "\"Twitter"
0:
  1:
    url: "http://t.co/TQHj9dN0"
    text: "\"This is why I don't give you a job"
1:
  2:
    url: "http://twitter.com/newsycoambinator/statuses/157749990473732097"
    text: "\"Twitter"
2:
  3:
    url: "http://t.co/iUCM3gqf"
    text: "\"People wonder why I'm an atheist ..."
3:
  4:
    url: "http://news.ycombinator.com"
    text: "\"Hacker News"
4:
  5:
    url: "http://www.davidkendal.net"
    text: "\"davidkendal.net"
5:
  6:
    url: "http://twitter.com/phazonoverload/statuses/159373703422029824"
    text: "\"Twitter"
6:
  7:
    url: "http://twitter.com/#!/herpderpedia"
    text: "\"@herpderpedia"
7:
  8:
    url: "http://t.co/rogAAD7e"
    text: "@LordJawsh."

The full code is:

            public function admin_recent_links_settings($admin)
            {
                $config = Config::current();
                if(empty($_POST)) {
                    $links = $config->recent_links;
                    $linkstext = "";
                    foreach ($links as $link) {
                        $linkstext .= $link['url'].",".$link['text']."\n";
                    }
                    return $admin->display("recent_links_settings",array("linkstext" => $linkstext));
                }
                if (isset($_POST['show_recent_links'])) {
                    $showlinks = True;
                } else {
                    $showlinks = False;
                }
                if (isset($_POST['recent_links_reverse_order'])) {
                    $reverse = True;
                } else {
                    $reverse = False;
                }
                $lines = explode("\n", $_POST['recent_links']);
                $lines = array_filter($lines,'trim');
                $links = array();
                foreach ($lines as $line) {
                    $phrases = explode(",",$line);
                    $href = trim(array_shift($phrases));
                    $text = "";
                    while ($phrase = array_shift($phrases)) {
                        $text .= $phrase;
                    }
                    $link = array("url" => $href, "text" => $text);
                    $links[] = $link;
                }
                if (($config->set("recent_links_title", $_POST['recent_links_title'])) && ($config->set("recent_links_display_count", $_POST['recent_links_di$
                Flash::notice(__("Settings updated."), "/admin/?action=recent_links_settings");
                }
            }