[devote]

Можно, пожалуйста, поподробней?

примерно так:

<?php
    header("Content-Type: application/javascript");
?>
$(function(){

    // keep a reference to the query processor, so you can stop a query if necessary
    var xhr;

    function loadContent(url, push) {

        // previous operation interrupt request
        if (xhr) xhr.abort();

        var
            fragmentsUrl = url.split("?"),
            reqUrl = fragmentsUrl.shift();

        // ask for new data
        xhr = $.ajax({
            url: "<?php echo _LINK_PATH;?>ajax/core.php" + (fragmentsUrl.length ? "?" + fragmentsUrl.join("?") : ""),
            data: {"action": "page", "url": reqUrl},
            type: "post",
            dataType: "json",
            success: function(data, textStatus, xhr) {
                if (data.status == 1) {

                    // change the content
                    $("#dynamic_content").html(data.page.template);

                    // iterate through all the tags with the name script
                    $("script").each(function(){

                        // looking for a modular script
                        if (/(.*)<?php echo str_replace('/', '\\/', _LINK_PATH );?>js\/jscore.php\?module(.*)$/i.test(this.src)) {
                            var parent = this.parentNode;

                            // remove the script found to free up memory
                            parent.removeChild( this );
                            // Create a new script
                            var script = document.createElement('script');
                            script.type = "text/javascript";
                            script.async = "async";
                            script.src = "<?php echo _LINK_PATH;?>js/jscore.php?module=" + data.page.module;

                            // load it for execution
                            parent.appendChild(script);

                            return false;
                        }
                    });

                    if (data.page.title) {
                        document.title = data.page.title;
                    }

                    if (push) {
                        // replace the link in your browser
                        history.pushState(null, null, url);
                    }
                }
            },
            complete: function(xhr, textStatus) {
                //alert(xhr.responseText);
            },
            error: function(xhr, textStatus) {
            }
        });
    }

    $(window).on('popstate', function(e){
        /*
        * mind you, this is the only difference when working with the library,
        * Because the object document.location not be rebooted, so
        * History library returns generated by "location" object inside
        * Object window.history, so get it out of the "history.location".
        * For browsers support "history.pushState" get
        * Shaped object "location" with the usual "document.location".
        */
        var loc = history.location || document.location;
        // load the desired content
        loadContent(loc.href);
    });

    $(document).on('click', 'a.ajax', function(e) {
        if (window.history.pushState) {
            var href = $(e.target).closest('a').attr('href');
            href && loadContent(href, true);
            e.preventDefault();
        }
    });

    // if the link has a class of 'external' means to open it in another browser tab
    $(document).on('click', 'a.external', function(e) {
        var href = $(e.target).closest('a').attr('href');
        href && window.open(this.href);
        e.preventDefault();
    });
});