TbScrollSpy.php

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<?php
class TbScrollSpy extends CWidget
{
        public $selector = 'body';

        public $target;

        public $offset;

        public $events = array();

        public function run()
        {
                $script = "jQuery('{$this->selector}').attr('data-spy', 'scroll');";

                if (isset($this->target)) {
                        $script .= "jQuery('{$this->selector}').attr('data-target', '{$this->target}');";
                }

                if (isset($this->offset)) {
                        $script .= "jQuery('{$this->selector}').attr('data-offset', '{$this->offset}');";
                }

                $cs = Yii::app()->getClientScript();
                $cs->registerScript(__CLASS__ . '#' . $this->selector, $script, CClientScript::POS_BEGIN);

                foreach ($this->events as $name => $handler) {
                        $handler = CJavaScript::encode($handler);
                        $cs->registerScript(
                                __CLASS__ . '#' . $this->selector . '_' . $name,
                                "jQuery('{$this->selector}').on('{$name}', {$handler});"
                        );
                }
        }
}