<selectclass="form-control"name="met_select"id="met_select"ng-model="selectedMethod"ng-options="m.name for m in methods"ng-change="load_instructions(selectedMethod)">
<optgroupng-repeat="m in methods"label="{{ m.name }}">
<selectng-hide="!selectedMethod"class="form-control"name="instruction_select"id="instruction_select"ng-model="selectedIns"ng-options="ins.name for ins in selectedMethod.instructions"ng-change="load_tries(selectedIns)">
<optionng-repeat="ins in m.instructions"ng-value="ins.id">{{ins.name}}</option>