Eliminate all vertical and diagonal lines in matlab

Here is my code:

clear all;close all;clc;
%Input Image
      A = imread('C:\Users\efu\Desktop\5.png');
%   figure, imshow(A);

C=medfilt2(A,[3 5]);
%   figure,imshow(C);

D=imfill(C);
%  figure,imshow(D);

%Image obtained using MATLAB function 'edge'

E=edge(D,'canny',[0.01 .02],3);
 figure,imshow(E);title('Image obtained using MATLAB function');

image=E;
img=im2bw(image);
%  imshow(img)

se = strel('line',3,0);
zz = imerode(img,se);
 figure,imshow(zz);

After canny edge detection:

After Eroding:

Here the problem is that after eroding all horizontal edges are broken, but i dont want that. i want to extract all horizontal lines without breaking,besides want to remove all vertical and diagonal lines. please someone modify the code or give me any resource so that i can do the task.