php ช่วยหน่อยคับ กดเพิ่มข้อมูลแล้ว พวกรายละเอียดมันไม่ขึ้นโชว์

 function register(){
             $this->data['my_session']= $this->session->userdata;
        if($this->input->post('searchid')!=""){
            $this->data['Subjectdetail'] = $this->frontend->getdbwhere('tblsubject',array('tblsubject.SubjectCode like'=>$this->input->post('searchid')."%"));
        }
        $this->tp->assign($this->data);
        $this->tp->display('frontend/register.html');
 }
 function addsessionregister($id){  
        $my_session=$this->session->userdata;
        $bookregis=$my_session['UserCountSubject']+1; 
        $Subject = $this->frontend->getdbwhere('tblsubject',array('tblsubject.SubjectCode' =>$id));   
       $this->session->set_userdata('UserCountSubject',$bookregis);
       $this->session->set_userdata('SubjectCode',$bookregis.$Subject[0]->SubjectCode); 
       $this->session->set_userdata('SubjectName',$bookregis.$Subject[0]->SubjectName); 
      $this->session->set_userdata('SubjectCredit',$bookregis.$Subject[0]->SubjectCredit);
        redirect("home/register"); 
 }       
 function deletesessionregister($id){
        $my_session=$this->session->userdata;
        $bookregis=$my_session['UserCountSubject'] -1;
         $this->session->set_userdata('UserCountSubject',$bookregis);     
         redirect("home/register");   


   <center><font size="3">รายวิชาที่ที่เลือกไว้</font></center> <br/>
                         <table width="700" border="0" align="" cellpadding="3" cellspacing="2">
                            <tr bgcolor="#458B00" >
                                <td width="80" align="center" ><font color= #FFFFFF>รหัสวิชา</font></td> 
                                <td width="250" align="center"><font color= #FFFFFF>ชื่อรายวิชา</td>
                                <td width="30" align="center"><font color= #FFFFFF>หน่วยกิต</td>   
                                <td width="30" align="center"><font color= #FFFFFF>กล่ม</td>  
                                <td width="100" align="center"><font color= #FFFFFF>เวลา</td>  
                                <td width="10" align="center"><font color= #FFFFFF></td> 
                            </tr>
                            <div style="clear:both;"></div>   
                            {section name=a loop=$my_session['UserCountSubject']}
                            {$a=0}
                            <tr bgcolor="#EEEEEE">
                                <td width="80" align="center">{$my_session["SubjectCode{$a}"]}</td> 
                                <td width="250" align="">{$my_session["SubjectName{$a}"]}</td>
                                <td width="30" align="center">{$my_session["SubjectCredit{$a}"]}</td>   
                                <td width="30" align="center"></td>  
                                <td width="100" align="center"></td>
                                 <td width="10" align="center"><a href="{site_url()}home/deletesessionregister/{$a}">ลบ</a></td>  
                            </tr>   
                            {$a=$a+1}
                            {/section}   
                        </table><br/>