You can addd a VF page in the page Layout and in that VF page you can refer a link, which will satisfy your requirement. You can check the below link for moreinformation
You can't provide link at the place which you've highlighted as those are the links of the related list. So as Pramod suggested you can with the custom VFP as inline on page layout, OR you can also provide those links as fields on layout. Whichever suits you best.
You can addd a VF page in the page Layout and in that VF page you can refer a link, which will satisfy your requirement. You can check the below link for moreinformation
>> http://www.salesforce.com/us/developer/docs/pages/Content/pages_compref_outputLink.htm
Regards
Pramod