Yii2 comes with a charming twitter bootstrap version 3. But if it is less, then you can integrate with web templates that you like. One example is wonderfull template "adminLTE"

Here is a example on how to use Pjax with GridView (yii\grid\GridView) and ActiveForm (yii\widgets\ActiveForm) widgets in Yii2.

There is an issue on Yii2 to redirecting / urls to /frontend/web.
In other words we need a way to hidden /frontend/web from addresses.
We will do this without changing Apache configuration and creating virtual host or setting document root (It's good for share hostings that we have not access to apache.conf)

There are a few issues with the other solutions I originally used that I found from other wikis. I address the issues I had in this much simpler and shorter way. I am also going to explain what is going into way more detail than others to help people understand what's going on.

One of the things you will find tricky to implement is the the sorting and filtering of a GridView's column that displays related model data.

This wiki explains how to add calculated fields into your Yii Framework 2.0 gridview with filtering and sorting.