Add custom link types on the fly

Hi.

I've seen a lot of a plugins which add a custom link type but what I want to do is defining a variable containing a json and push elements in the link types dropdown.

Example :

var link_types = {
    "link_types":
    {
        "Links 1":
        [
            {
                "label": "Label 1-1",
                "url": "/url-1-1"
            },
            {
                "label": "Label 1-2",
                "url": "/url-1-2"
            }
        ],
        "Links 2":
        [
            {
                "label": "Label 2-1",
                "url": "/url-2-1"
            },
            {
                "label": "Label 2-2",
                "url": "/url-2-2"
            }
        ]
    }
};

I would retrieve this in the modal :

• URL
• Anchor
• Email
• Links 1
• Links 2

Anyone have an idea ?