Hide controller and action in pretty URL with Yii2

I need to change a URL in Yii2 using the URL Manager from

http://www.domain.com/index.php?r=tamil-article/articles&categ=Innovation&id=44

to

http://www.domain.com/44/Innovation.html

How can this be done?

You can resolve this by configuring your UrlManager to use prettyUrls.

After that you can add a custom url rule to the rules array (in config/main.php):

'urlManager'   => [
    'class'           => 'yii\web\UrlManager',
    // Disable index.php
    'showScriptName'  => false,
    // Add the .html suffix 
    'suffix' => '.html',
    // Disable r= routes
    'enablePrettyUrl' => true,
    'rules'           => [
        '<id:\d+>/<categ:\w+>' => 'tamil-article/articles',
    ],
],