Answers for "scrolling in css"

smooth scroll css

html {
  scroll-behavior: smooth;
}

/* No support in IE, or Safari
You can use this JS polyfill for those */
http://iamdustan.com/smoothscroll/

scroll css

<div style="overflow: scroll;">
	<?php echo $this->element('menu/left_sidebar'); ?>
</div>

// overflow: scroll;