Yii2 Dynamic URL Routing Rules

I want to set Dynamic Routing for url in Cms pages in yii2. When i add Cms page i will add page alias aboutus,faq,management etc , these alias will saved in db .

When i give URL rule static it will work ,[check code below]

'urlManager' => [               
            'showScriptName' => false,  
            'enablePrettyUrl' => true,  
            //'enableStrictParsing' => true,
            'rules'=>array(
'aboutus'=>'cms/index/1',
'faq'=>'cms/index/2',
'termacondition'=>'cms/index/3',
'management'=>'cms/index/4',
),
        ], 

But i want add url rule in dynamically .

I need add all dynamic page alias in config/main.php URL rule in yii2 Please help me.