PHP (regex) unknown word with special. characters "pairs matching" -

I do not know, how to understand the topic (title) I have something like this:

  & lt; H2 & gt; Title & lt; / H2 & gt; & Lt; & Lt; Navigation ID = "submenu" & gt; & Gt; & Lt; & Lt; Main level = "1" asd = "2" & gt; & Gt; & Lt; & Lt; Main level = "1" asd = "2" & gt; & Gt; & Lt; & Lt; Notmain & gt; & Gt; Asd & lt; & Lt; / Notmain & gt; & Gt; & Lt; & Lt; / Navigation & gt; & Gt; & Lt; P & gt; & Lt; A href = ".." & gt; Eddie & lt; / A & gt; Asdasdasd & lt; / P & gt; Oh no! The great rabbit is attacking us, and we are only the knights of a square table! & Lt; H2 & gt; There can be another tag here & lt; / H2 & gt; & Lt; & Lt; Footer & gt; & Gt; & Lt; & Lt; Copyright ID = "Copy" & gt; & Gt; & Lt; & Lt; / Footer & gt; & Gt;  

I should know and remember (in the form of text) objects in which there are two tags (but only the main parent). So for this example, I want some output like this:

  array (0 = & gt; ' gt; & gt; Lt; & lt; main level = "1" SD = "2"> gt; 
 gt; & gt; notmain & gt; & gt; Eddy  gt; & lt; / navigation & gt; & gt; '1 = & gt;' & lt; Piter & gt; & gt; & lt ; & Lt; Copyright ID = "copy"> >> <> > 
  

Spaces and white spaces, And tab, and the rest do not matter, because it trim, and using str_replace It is easy to touch. Only one problem is searching the method.

I was trying to start it again but there are some problems.

1. Only me Parents are interested in it, so any recursive search for ''
2. Before me No information about the word is found, it can be & lt;> and then return all :). I do not know, and no solution has been found if regex can remember what it has been found.

I hope my question is clear. Thx for reply!

PS I am using php for this, and I know php (quite well), so text solutions without code, or even ideas will be useful.

PS2 If there is a solution without any regex, it would be great, surely there is a brute force solution (character after analyzing the character), but there are many codes in it ...

"post-text" itemprop = "text">

How about:

% ^ & lt; & Lt; ([^ & Lt;] +?) & Gt; & Gt; $ (. +?) ^ & Lt; & Lt; ([^ & Lt;] +?) Receives this result when used with preg_match_all

  array (0)  
 
 = & gt; Array (0 = & gt; 'lt; & lt; Navigation id = "submenu"> gt; & lt; main level = "1" asd = "2"> gt; & gt; Main Level = "1" ADS = "2"> gt; & lt; No & gt; AD & lt; / lt; / notmain> & gt; & lt; / lt; / navigation & gt; & gt; 1 = & gt; & # 39; Piter & gt;; & gt; & lt; & lt; Copyright ID = "Copy" & gt; & gt; & lt; / footer & gt; & gt; ,), 1 = & gt; Array (0 = & gt; "Navigation ID =" Submenu ", 1 = & gt; 'Footer',), 2 = & gt; array (0 = & gt; 'lt; & lt; main level =' 1  < Lt; >, 1 = gt; '& lt; & lt; copyright id = "copy"> gt; & gt; array, = & Gt; '/ navigation', 1 = & gt; '/ footer',),)