diff -ur v3/ezmd.py v4/ezmd.py
--- v3/ezmd.py	2019-09-24 00:19:15.000000000 +0900
+++ v4/ezmd.py	2019-09-25 00:23:47.000000000 +0900
@@ -14,6 +14,8 @@
 
 next_mode = lambda s: 'p' if s == '/' else s
 
+lst_strip = lambda lst: list( map( lambda s: s.strip(), lst ) )
+
 def strip_head(s):
 	while s and s[0] in (' ', '\t'):
 		s = s[1:]
@@ -41,6 +43,22 @@
 			res.append(s)
 	return res
 
+s_idx = lambda s, p, dv=-1: s.index(p) if p in s else dv
+
+def do_str(s):
+	# a href
+	(h, t) = ('[[', ']]')
+	(ih, it) = list( map( lambda p: s_idx(s, p), (h, t) ) )
+	if 0 <= ih and ih < it:
+		s3 = lst_strip( ( s[:ih], s[ih+len(h):it], s[it+len(t):] ) )
+		m = s3[1]
+		if m:
+			(href, v) = lst_strip( m.split('|') ) if '|' in m else (m, m)
+			s3[1] = { 'a href="{}"'.format(href): v } if href else v
+		lst = list( filter( lambda o: o, s3 ) )
+		return lst[0] if len(lst) == 1 else lst
+	return s
+
 def do_mode_ul(buf, res):
 	buf = esc_join(buf)
 	buf = list( filter( lambda s: s.strip(), buf ) )
@@ -70,7 +88,7 @@
 	list( map(buf_to_stk_lsts, buf) ) # make lists
 
 	def lst_to(lst):
-		f = lambda o: lst_to(o) if type(o) == list else {'li /': o}
+		f = lambda o: lst_to(o) if type(o) == list else {'li /': do_str(o) }
 		lst = list( map(f, lst) )
 		return { 'ul': lst }
 
@@ -78,12 +96,12 @@
 
 def do_mode(mode, buf, res):
 	if mode in heads:
-		buf = list( map( lambda s: s.strip(), buf ) )
+		buf = lst_strip(buf)
 		buf = list( filter( lambda s: s!='', buf ) )
 		s = ''.join(buf)
 		res.append( { mode: s } )
 	elif mode == 'p':
-		buf = list( map( lambda s: s.strip(), buf ) )
+		buf = lst_strip(buf)
 
 		buf.append('')
 		(lsts, lst) = ( [], [] )
@@ -94,6 +112,8 @@
 				lsts.append(lst)
 				lst = []
 		for lst in lsts:
+			to_lst = lambda o: o if type(o) == list else [o]
+			lst = sum( map( lambda s: to_lst( do_str(s) ), lst ), [] )
 			res.append( { 'p': lst } )
 	elif mode == 'pre':
 		while buf and buf[0] == '':