$js = new AssetCollection(array(
   new GlobAsset('./static/js/*', array(new JSMinFilter())),
   new AssetReference($am, 'jquery'),
));

$css = new AssetCollection(array(
   new GlobAsset('./static/css/*'),
   new AssetReference($am, 'base_css'),
   new FileAsset('./static/css/bootstrap.min.css'),
   new FileAsset('./static/css/blog.css')
), array(new CssMinFilter()));