Force HTTP only via .htaccess or PHP

Force HTTP in PHP

* Redirect WordPress front end https URLs to http without a plugin
* Necessary when running forced SSL in admin and you don't want links to the front end to remain https.
* @link http://blackhillswebworks.com/?p=5088
*/
add_action( 'template_redirect', 'bhww_ssl_template_redirect', 1 );
function bhww_ssl_template_redirect() {
if ( is_ssl() && ! is_admin() ) {
if ( 0 === strpos( $_SERVER['REQUEST_URI'], 'http' ) ) {
wp_redirect( preg_replace( '|^https://|', 'http://', $_SERVER['REQUEST_URI'] ), 301 );
exit();
} else {
wp_redirect( 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'], 301 );
exit();
}
}
}

Force HTTP via .htacess

RewriteEngine On
RewriteCond %{HTTPS} on
RewriteRule (.*) http://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]