Thank you very much for your quick response guys.

@robwscott and @Motley - your solutions did not work for me

Below is my menu structure

<ul id="acc1" class="ui-accordion-container">
    <li>
        <a class="ui-accordion-link acc1">Menu-1</a>
        <div>
            <a id="basicTag" class="ui-accordion-innerlink" href="Link1.aspx">Link1</a><br />
            <a class="ui-accordion-innerlink" href="Link2.aspx">Link2</a>
        </div>
    </li>
    <li>
        <a class="ui-no-accordion" href="Link3.aspx">Menu-2</a>
    </li>
    <li>
        <a class="ui-accordion-link acc1">Menu-3</a>                                
        <ul class="ui-accordion-container" id="acc2">
            <li>
                <a class="ui-accordion-link acc2">SubMenu-1</a>
                <div>
                    <a class="ui-accordion-innerlink" href="Link4.aspx">Link4</a><br />
                    <a class="ui-accordion-innerlink" href="Link5.aspx">Link5</a>
                </div>
            </li>
            <li>
                <a class="ui-accordion-link acc2">SubMenu-2</a>
                <div>
                    <a class="ui-accordion-innerlink" href="Link6.aspx">Link6</a><br />
                    <a class="ui-accordion-innerlink" href="Link7.aspx">Link7</a>
                </div>
            </li>
        </ul>
    </li>
</ul>

I sincerely apologize for my previous menu html. Thought I was unaware of some jquery-accordion plugin function. Above is the menu I am trying to achieve with accordion feature. All the aspx pages are content pages and menu is in master page.

I am also ready to try any different plugin that would make this accordion menu in master page work.

Please suggest.