Feeling your pain.
Short answer: AI SVG export is (one of) the reason(s) I need therapy.
Long answer: I've successfully exported SVG from AI (CS6) with id's. See below:

Turns into:
<g id="ZONES">
<path id="Zone3" fill="none" stroke="#000000" stroke-miterlimit="10" d="M756.485,373.758l-1.764,8.361l16.43,3.908l-0.426,2.34
l6.586,1.164l0.533-2.439l26.047,5.664L789.667,464.4l-10.812-2.232l-3.975,18.355l11.258,2.34l-5.574,26.797l-1.59-0.379
l-13,69.334l11.33,2.646l1.67-8.312l37.164-186.996L756.485,373.758z M558.887,341.28l92.963,19.719l-0.625,6.619l18.766,3.914
l2.24-6.494l57.076,11.744l1.832-9.164l-170.873-34.653L558.887,341.28z"/>
<path id="Zone4" fill="none" stroke="#000000" stroke-miterlimit="10" d="M434.33,427.335c-0.429-1.498-0.982-3.717-1.175-5.787
c-0.233-2.526-0.146-5.851-0.074-7.606l0.062-1.478l-24.606-1.399l-88.614-59.936l-23.902,34.039l-11.858,17.166l38.417,25.742
L316.31,543.08l14.66,0.7l4.754-102.191l48.545-14.975l50.645,2.746L434.33,427.335z"/>
<polygon id="Zone8" fill="none" stroke="#000000" stroke-miterlimit="10" points="675.512,441.043 661.075,418.389
670.225,371.531 651.227,367.615 641.927,414.635 619.298,429.342 551.059,415.363 546.972,433.756 774.876,480.521 778.86,462.17
"/>
A few problems though:
- sometimes AI just add a random string to that id.. avoid the underscore character, is what I can say with certainty.
- be prepared that some of these will become paths, and some become polygons, as you see above. So, if you're manipulating them all at once, assign them all a class of "thisIsOneOfMyZones", for example using jQuery. That hack is the best I've come up with so far. Please share if you hack the secret of paths/polygons choice in the export.
- Possibly, giving the parent group an id will affect how the child node id's are translated in the SVG export. That's needed anyway, or at least convenient if you want to manipulate these programmatically, which I'm guessing you're doing :)