Vim-LaTeX is a popular plugin to edit and compile LaTeX files using Vim. However, it has code folding turned on by default.
To disable code folding in Vim-LaTeX, add these lines to your vimrc:
let g:Tex_FoldedSections = "" let g:Tex_FoldedEnvironments = "" let g:Tex_FoldedMisc = ""
This disables all the three types of code folding enabled by Vim-LaTeX.
Tried with: Vim-LaTeX 1.8.23, Vim 7.3 and Ubuntu 12.04 LTS