Hi,

You have to use Javascript to fulfill your requirement.
see below Example for your reference.

Visualforce Page:
<apex:page id="myPage" tabstyle="Account" controller="Expandcollapsepage" >
<script>
        function switchMenu(obj,obj1,obj2)
        {
            var el = document.getElementById(obj);                                      
            if ( el.style.display != 'none' ) {
            el.style.display = 'none';
            }
            else {
            el.style.display = '';
            }
            var e2 = document.getElementById(obj1);                                      
            if ( e2.style.display != 'none' ) {
            e2.style.display = 'none';
            }
            else {
            e2.style.display = '';
            }
             var e3 = document.getElementById(obj2);                                      
            if ( e2.style.display != 'none' ) {
            e3.style.display = 'none';
            }
            else {
            e3.style.display = '';
            }

        }
</script>
    <apex:pageblock id="pnMain" title="Expand/Collapse Example">
        <apex:repeat value="{!lstThingtype}" var="th">
            <apex:outputpanel id="plusimage" style="display:none;">
                  <apex:image url="{!$Resource.Plus_Image}" onclick="switchMenu('{!$Component.inlinetablesec}','{!$Component.minusimage}','{!$Component.plusimage}')" title="Expand - Team Member's"/>
            </apex:outputpanel>
            <apex:outputpanel id="minusimage"  >
                  <apex:image url="{!$Resource.Minus_image}" onclick="switchMenu('{!$Component.inlinetablesec}','{!$Component.plusimage}','{!$Component.minusimage}')" title="Collapse - Team Member's"/>
            </apex:outputpanel>
            <apex:outputLabel value="{!th.strThingtype}"></apex:outputLabel>
            <apex:outputpanel id="inlinetablesec">              
                <apex:repeat var="count" value="{!th.lstThings}">
                    <br/>
                    <apex:outputLabel value="{!count.strThing}"></apex:outputLabel>                   
                </apex:repeat>
            </apex:outputpanel> 
            <br/>
        </apex:repeat>      
    </apex:pageblock>
</apex:page>

Apex Class:
public class Expandcollapsepage{
    public List<Account> getaccsandtmember(){
      List<Account> accounts = [Select Id,(Select TeamMemberRole, User.Name From Account.AccountTeamMembers), Name, BillingCountry from Account];
      return accounts;
    }
    Public List<Thingtype> getlstThingtype(){
        List<Thingtype> lstThingtype = new List<Thingtype>();
       
        List<Things> lstThings = new List<Things>();
        Things objThings;
        objThings = new Things();
        objThings.strThing = 'Mobile';
        lstThings.add(objThings);
       
        objThings = new Things();
        objThings.strThing = 'Laptop';
        lstThings.add(objThings);
       
        objThings = new Things();
        objThings.strThing = 'Camera';
        lstThings.add(objThings);
       
        Thingtype objThingtype;
        objThingtype = new Thingtype();
        objThingtype.strThingtype = 'Electronics';       
        objThingtype.lstThings = lstThings;
        lstThingtype.add(objThingtype);
       
        lstThings = new List<Things>();
       
        objThings = new Things();
        objThings.strThing = 'Fiction';
        lstThings.add(objThings);
       
        objThings = new Things();
        objThings.strThing = 'Non fiction';
        lstThings.add(objThings);
       
        objThingtype = new Thingtype();
        objThingtype.strThingtype = 'Books';
        objThingtype.lstThings = lstThings;
        lstThingtype.add(objThingtype);
       
        return lstThingtype;
    }
   
   
    Public class Thingtype{
        Public string strThingtype {get; set;}
        Public List<Things> lstThings{get; set;}
    }
    Public class Things{
        Public string strThing {get; set;}
    }
}


Thank You,
Hitesh Patel
SFDC Certified Developer & Administrator & Advanced Administrator & Sales cloud consultant
Email :- hiteshpatel.aspl@gmail.com
My Blog:- http://mrjavascript.blogspot.in/