如何在eclipse for PHP项目中显示源文件夹？

I am having an issue with eclipse.

Currently my folders with sources are not visible if project has PHP nature in eclipse:

Is there any solution? Or should I reinstall my eclipse?

P.S. There might be a good guide how to setup a good Eclipse + PDT + PHPUnit env?

Click "View Menu"(right-upper triangle of PHP Explorer), click "Group by namespaces".