<aura:iteration items="{!v.objWrap}" var="item" indexVar="idx">
...
...
...
 </aura:iteration>

<a href="javascript:void(0); onclick="myfunction()"">Load More</a>

<aura:iteration items="{!v.objWrap}" var="item" indexVar="idx">
    <aura:if value="{!idx < 10}">
        <a href="javascript:void(0); onclick="otherfunction()"">{!item.Something__c}</a>
    </aura:if>
    <aura:if value="{!idx == 10}">
        <a href="javascript:void(0); onclick="myfunction()"">Load More</a>
    </aura:if>
</aura:iteration>

<aura:iteration items="{!v.objWrap}" var="item" indexVar="idx">
  <aura:if isTrue="{!lessthan(idx,10)}">
    <a href="javascript:void(0);" onclick="otherfunction()">{!item}</a>
  </aura:if>
  <aura:if isTrue="{!idx == 10}">
    <a href="javascript:void(0);" onclick="myfunction()">Load More</a>
  </aura:if>
</aura:iteration>