for plan in plans:
    feature_name = "feature name"
    data = features.get(feature_name)
    if data is None:
        features[feature_name] = [ plan.feature_object_data ]
    else:
        features[feature_name].append(plan.feature_object_data)
    pass

''' dictionary of feature names
'''
features = {
    "feature name" : [ # a list, *.append(...)
        # append the corresponding plan feature data
        # - it can be the feature code or the feature object
    ],
    ...
}

<!--- HTML -->



<tal:loop repeat="planids plan_ids">
    <!-- column header -->

    <tal:x tal:define="idx repeat/plan_ids/index;
           values features/values;
           values python:(values.reverse(), values)[1]">

        <div style="float:left"
             class="plan-column"
             tal:repeat="feature_object python:values[idx]">

            <div tal:content="feature_object/name">feature name</div>

        </div>
    </tal:x>

</tal:loop>