A codeigniter libary to compress HTML, CSS, Javascript and make sprite image
Copy the asset.php, jsmin.php, cssmin.php file and paste it to your library folder
Load it in your controller
$this->load->library('asset');
to comppress css:
$this->asset->compress_css('my_production_css_folder/','my_distribution_css_folder/');
to compress js
$this->asset->compress_css('my_production_js_folder/','my_distribution_js_folder/');
to compress HTML (which might contain CSS and JS)
$this->asset->compress_html('app/views/','app/my_distribution_views folder/');