Create sublime-text-2/Packages/User/Default (Windows).sublime-mousemap
and drop in the following code to disable CTRL-Left click. You can also assign it to a different command if you want.
[
{
"button": "button1", "count": 1, "modifiers": ["ctrl"],
"press_command": "null"
}
]
Replace Windows
with Linux
or OSX
according to your platform.