This can be done using the registerCss() method of the CClientScript class. CClientScript manages JavaScript and CSS stylesheets for views. registerCss()registers a piece of CSS code.
Place code similar to the example code below in your View
Yii::app()->clientScript->registerCss('customCSS',<<<CSS li { font-weight: normal; } CSS );
In the code above the first parameter is a string and ID that uniquely identifies this piece of CSS code. The second Parameter contains the CSS code.
This code will automatically embed CSS into your webpage using your VIEW.