php - base_url() not loading css file -

i trying load view controller file. if reference class in view fine, if reference method class css not load.

here simple example:

controller file:

<?php class example extends ci_controller  {     public function index ()     {         $this->load->view('myview');     } } 

in view file works fine:

<li><a href="<?=base_url('example');?>">example</a></li> 

but, not:

<li><a href="<?=base_url('example/index');?>">example</a></li> 

i tried use site_url() function result same.

note: have loaded url helper.

have change .htaccess file remove index.php in url?

<li><a href="<?=base_url('example/index');?>">example</a></li> 

it not work.