function efIPI_ipi($_parser, $_title, $_arguments = array()) {
    global $wgOut, $wgTitle, $wgUser;
    global $eIPI_path;

    global $eIPI_scripts;

...

$Skin = $wgUser->getSkin();

...

    $Title = Title::newFromText($_title);
    $result = $Skin->link($Title, (array_key_exists('altname', $_arguments) && !strlen($_arguments['size']) ? $_arguments['altname'] : null), array(
        'class' => 'ipi'. ($_arguments['iconic'] ? ' iconic' : ''),
        'rel' => $Title->mTextform,
    ));