En-queue scripts & styles for Bootstrap and Less.js in WordPress

functions.php

<?php
/**
 * Enqueue scripts and stylesheets
 */

function enqueue_less_styles($tag, $handle) {
    global $wp_styles;
    $match_pattern = '/\.less$/U';
    if ( preg_match( $match_pattern, $wp_styles->registered[$handle]->src ) ) {
        $handle = $wp_styles->registered[$handle]->handle;
        $media = $wp_styles->registered[$handle]->args;
        $href = $wp_styles->registered[$handle]->src . '?ver=' . $wp_styles->registered[$handle]->ver;
        $rel = isset($wp_styles->registered[$handle]->extra['alt']) && $wp_styles->registered[$handle]->extra['alt'] ? 'alternate stylesheet' : 'stylesheet';
        $title = isset($wp_styles->registered[$handle]->extra['title']) ? "title='" . esc_attr( $wp_styles->registered[$handle]->extra['title'] ) . "'" : '';

        $tag = "\r\n";
    }
    return $tag;
}
add_filter( 'style_loader_tag', 'enqueue_less_styles', 5, 2);

function hyp_enqueue_scripts() {
  if ( !is_admin() ) {
		wp_enqueue_style('less', get_template_directory_uri() . '/style.less', false, null);
		wp_register_script( 'lessjs', get_template_directory_uri() . '/js/less-1.4.1.min.js', false, null ); 
		wp_enqueue_script( 'lessjs' );
		wp_enqueue_style('bpl-styles', get_template_directory_uri() . '/style.css', false, null);

		// jQuery is loaded in header.php using the same method from HTML5 Boilerplate:
		// Grab Google CDN's jQuery, with a protocol relative URL; fall back to local if offline
		// It's kept in the header instead of footer to avoid conflicts with plugins.
		wp_deregister_script('jquery');
		wp_register_script('jquery', "http" . ($_SERVER['SERVER_PORT'] == 443 ? "s" : "") . "://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js", false, null);
		wp_enqueue_script('jquery');

		wp_register_script( 'bootstrap-js', get_template_directory_uri() . '/bootstrap/js/bootstrap.min.js', false, null, true ); 
		wp_enqueue_script( 'bootstrap-js' );
	}
}

add_action('wp_enqueue_scripts', 'hyp_enqueue_scripts', 100);
?>