CRM 2011: Creating a Network Path Text Control for Microsoft Dynamics CRM 2011

Following approach is a little bit unsupported so be careful using it.

Create JavaScript webresource, put in it following code, call OnLoad method during loading of form of your entity:

function OnLoad()
{
    Transform("new_name");
}

function Transform(fieldid)
{
    var c = document.getElementById(fieldid);
    if (c == null)
        return;

    c.style.textDecoration = "underline";
    c.style.color = "blue";
    c.style.cursor = "hand";
    c.ondblclick = function()
    {
        window.open(Xrm.Page.getAttribute(fieldid).getValue());
    };
}

Field has to be simple text type. Replace new_name with field you want to transform. Result for my case: