Absolute link for each post

we have sizzlers category on the home page like 3 rows and 3 columns 
 
i need to maintain session for each url 
 
 protected void Page_Load(object sender, EventArgs e)
    {
 
        string GallerySizzlers = Commons.CategorySizzlers;
    int iGalleryIndex = 0;
 
        List<IPublishable> lstGalleriesSizz = BlogEngine.Core.ChennaiPatrikai.Commons.GetPostByCategory(GallerySizzlers, 12);
 if (lstGalleriesSizz.Count > iGalleryIndex)
        {
            string sImageTag = BlogEngine.Core.ChennaiPatrikai.Commons.GetImage(lstGalleriesSizz[iGalleryIndex].Content, 60, 65, true, 100);
            sImageTag = sImageTag.Replace("<img", "<img border= ...