Dificuldade em colocar checkbox em treeview com ou sem bootstrap

@*Daqui para baixo, tudo se relaciona com a treeview*@ 
    <div class="well" style="width:100%; padding: 8px 0;">
        <div style="overflow-y: scroll; overflow-x: hidden; height: 300px;">
            <ul class="nav nav-list">
                <li>
                    <label class="tree-toggler nav-header">Produto</label>
                    <ul class="nav nav-list tree">
                        <li><a href="#">MIP</a></li>
                        <li>
                            <label class="tree-toggler nav-header">Família: ACCUVIT</label>
                            <ul class="nav nav-list tree">
                                <li><a href="#">ACCUVIT COMREV FRX30</a></li>
                            </ul>
                        </li>
                        <li>
                            <label class="tree-toggler nav-header">Família: FLOGORAL</label>
                            <ul class="nav nav-list tree">
                                <li><a href="#">FLOGORAL SPRAY CEREJA CTX30ML</a></li>
                                <li><a href="#">FLOGORAL SPRAY MENTA CTX30ML</a></li>
                                <li><a href="#">FLOGORAL CREM DENTAL CTX70G</a></li>
                            </ul>
                        </li>
                        <li><a href="#">GX</a></li>
                        <li><a href="#">RX</a></li>
                        <li>

                        </li>

                        <li>
                            <label class="tree-toggler nav-header">Header 1.1</label>
                            <ul class="nav nav-list tree">
                                <li><a href="#">Link</a></li>
                                <li><a href="#">Link</a></li>
                                <li>
                                    <label class="tree-toggler nav-header">Header 1.1.1</label>
                                    <ul class="nav nav-list tree">
                                        <li><a href="#">Link</a></li>
                                        <li><a href="#">Link</a></li>
                                    </ul>
                                </li>
                            </ul>
                        </li>

                    </ul>
                </li>