<select class="form-control select2" id="idMetas" name="metaID" style="width: 100%;" required>
        {% for meta in metas %}
            <option value="{{ meta.metaID }}">{{ meta.metaCODIGO }} - {{ meta.metaDESCRIPCION|striptags }}</option>
        {% endfor%}
</select>

<script type="text/javascript">
    $(document).ready(function() {
        $('.select2').select2();
    });
</script>