CakePHP Helper to build a bootstrap menu item with an font-awesome icon

BootstrapLiHelper.php

<?php

App::uses('AppHelper', 'View/Helper');

class BootstrapHelper extends AppHelper {
    public $helpers = array('Html');

    /**
     * navLi: adds a li item with a link 
	 *
	 * @param string $title Text for link
	 * @param string $icon_class font-awesome fa-* icon class 
	 * @param string $controller controllers name 
	 * @param string $action action 
	 * @param string $pages name of the static page in case of pages controller 
	 * @param array  $prefixes array containing the prefixes in case a prefix route 
	 * @param string $plugin name of a plugin to route
	 * @return li element with a link to be used ina bootstrap menu 
     */
    public function navLi($title, $icon_class, $controller, $action, $pages, $prefixes=null, $plugin=null) {
		$title_icon = "<i class='fa fa-fw $icon_class'></i> $title";
		$class = ($this->params['controller'] == $controller && $this->params['action'] == $action) ? 'active' : '';
		$routingPrefixes = Configure::read('Routing.prefixes');
		$url = array('controller' => $controller, 'action' => $action, $pages);
		$url['plugin'] = isset($plugin) ? $plugin : false;
		foreach ($routingPrefixes as $prefix) {
			if(isset($prefixes) && in_array($prefix,$prefixes)){
				$url[$prefix] = true;
			}else{
				$url[$prefix] = false;
			}
		}
        $link = $this->Html->link($title_icon, $url, 
			['escape'=>false, 'class'=>$class]);
        return "<li class='$class'>" . $link . '</li>';
    }
}