Think implement Microsoft Official website navigation problem PHP infinite pole classification Multi-table query problem

I use the thinkphp developed, navigation solutions, products and services are a class classification, environmental protection is a class two classification. Level two category below is a list of articles.
I loop through two cycles through the recursive multidimensional array method to cycle through the first class and the two level classification. The question now is how to get a list of the articles under level two classification?

  
   Use 
   
    admin\model\category;                    $cate =m (' Cate ')->order (' sort ')->select ();                    Import ("Admin.Model.Category"); $cate =category::unlimitedforlayer ($cate);//multidimensional array reading infinite pole classification
   
                  
  

   
                    
 
                            
  
     
{$v. Name}
       
        
        
{$value. Name}
 
        
 
         
List of articles
 
        
 
        
        
        
      
                    
 
                    

   
  

Reply content:

I use the thinkphp developed, navigation solutions, products and services are a class classification, environmental protection is a class two classification. Level two category below is a list of articles.
I loop through two cycles through the recursive multidimensional array method to cycle through the first class and the two level classification. The question now is how to get a list of the articles under level two classification?

  
   
     use admin\model\category;                    $cate =m (' Cate ')->order (' sort ')->select ();                    Import ("Admin.Model.Category"); $cate =category::unlimitedforlayer ($cate);//multidimensional array reading infinite pole classification 
   
                  
  

   
                    
 
                            
  
     
{$v. Name}
       
        
        
{$value. Name}
 
        
 
         
List of articles
 
        
 
        
        
        
      
                    
 
                    

   
  

In PHP once again based on the list ID, query the corresponding article data!

