<script>
window.___gcfg = {lang: 'pt-BR'};
(function(doc, script) {
    var js,
        fjs = doc.getElementsByTagName(script)[0],
        frag = doc.createDocumentFragment(),
        add = function(url, id) {
            if (doc.getElementById(id)) {return;}
            js = doc.createElement(script);
            js.src = url;
            id && (js.id = id);
            frag.appendChild( js );
        };

    // Google Analytics
    //add(('https:' == location.protocol ? '//ssl' : '//www') + '.google-analytics.com/ga.js', 'ga');
    // Google+ button
    add('https://apis.google.com/js/plusone.js');
    // Facebook SDK
    add('//connect.facebook.net/en_US/all.js#xfbml=1', 'facebook-jssdk');
    // Twitter SDK
    add('//platform.twitter.com/widgets.js');

    fjs.parentNode.insertBefore(frag, fjs);
}(document, 'script'));
</script>



depois só chama o <div class="fb-like" data-href="http://artbrasilis.com.br" data-send="false" data-layout="button_count" data-width="150" data-show-faces="false"></div>

no resto das páginas