serve assets with correct content type header

output_helper.php

<?php defined('BASEPATH') OR exit('No direct script access allowed');

if( ! function_exists('show_css'))
{
	function show_css($content)
	{
		show_output('text/css', $content);
	}
}

// --------------------------------------------------------------------

if( ! function_exists('show_js'))
{
	function show_js($content)
	{
		show_output('text/javascript', $content);
	}
}

// --------------------------------------------------------------------

if( ! function_exists('show_json'))
{
	function show_json($data)
	{
		show_output('application/json', json_encode($data));
	}
}

// --------------------------------------------------------------------

if( ! function_exists('show_output'))
{
	function show_output($content_type, $content)
	{
		get_instance()->output->set_content_type($content_type)
							  ->set_output($content);
	}
}